arindam mitra
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 5 Number of sequences of $0$s, $1$s, and $2$s with length $n$ such that there is a $0$ somewhere between every pair of $2$s 4 A subset of size $101$ from $1, 2, 3, \ldots, 200$ must contain one element which divides another 4 No. of different possible arrangements. 2 Finding number of relations using counting 2 Counting permutations of a multiset restricted by nearness condition

Reputation (724)

 +5 Loss functions for regression +10 Histogram of duplication in n choose k +5 Use the PIE to prove an identity +10 Number of sequences of $0$s, $1$s, and $2$s with length $n$ such that there is a $0$ somewhere between every pair of $2$s

Questions (13)

 13 Combinatorial identity with sum of binomial coefficients 9 If an integer is not divisible by 2 or 5 3 Use the PIE to prove an identity 3 proving an invloved combinatorial identity 2 Application of PIE

Tags (49)

 28 combinatorics × 28 2 relations 5 permutations × 2 2 sequences-and-series 5 recursion 1 discrete-mathematics × 3 4 elementary-number-theory × 2 1 inclusion-exclusion × 3 2 recurrence-relations × 2 1 induction × 2

Accounts (6)

 Mathematics 724 rep 313 Stack Overflow 159 rep 9 Cross Validated 106 rep 3 Ask Ubuntu 101 rep Linguistics 101 rep 1