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Feb
22
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
22
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
22
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
22
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
22
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
22
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
22
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
22
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
22
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
21
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
21
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
21
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
21
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
21
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
21
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Feb
21
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
21
revised How many different numbers can be written if each used digit symbol is used at least 2 times?
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Feb
21
comment How many different numbers can be written if each used digit symbol is used at least 2 times?
@MarkusScheuner : I believe that $P(n,d)$ function can be a key function to detect prime numbers. It has wonderful features
Feb
21
comment How many different numbers can be written if each used digit symbol is used at least 2 times?
Your answer is great. Have you read my conjecture : $n^{d}\equiv P(n,d) \pmod {d}$ , I have not found any counter-example yet. It satisfies for any number in your table but I do not know how to prove it .Thanks for helps.
Feb
21
comment How many different numbers can be written if each used digit symbol is used at least 2 times?
:Thanks a lot for answer . I edited my question with wonderful discover for $P(n,d)$. Could you please share your comments on my last edit?