# qwx

less info
reputation
8
bio website location age member for 2 years, 1 month seen 14 hours ago profile views 45

# 52 Actions

 Jun27 comment combinatorics counting sets with a one element having values in another set and seems also it will better scale than putting all the k elts inline $2^{n-1+k}-1$ Jun27 accepted combinatorics counting sets with a one element having values in another set Jun27 comment combinatorics counting sets with a one element having values in another set ok and seems to work for the example, thx Jun27 revised combinatorics counting sets with a one element having values in another set added 3 characters in body Jun27 asked combinatorics counting sets with a one element having values in another set May31 accepted how many different possible pairs are there in a n-tuple? May31 awarded Commentator May31 comment how many different possible pairs are there in a n-tuple? @Shaktal $(n)_a$ is $\binom{n}{a} * a!$ like said in the ncmath's answer? May31 comment how many different possible pairs are there in a n-tuple? ah right (a,b) and (b,a) is the same unordered pair May30 comment Integer sequence comparison, binomials Vs power yes wrong calcul May30 comment Integer sequence comparison, binomials Vs power it's round(x)-1 May30 revised Integer sequence comparison, binomials Vs power added 58 characters in body May30 asked Integer sequence comparison, binomials Vs power May30 comment how many different possible pairs are there in a n-tuple? there should be more unordered than ordered? May30 comment how many different possible pairs are there in a n-tuple? what is equal your second result $(n)_2$, please May30 asked how many different possible pairs are there in a n-tuple? May30 accepted factorial Vs power sequence May30 comment factorial Vs power sequence well I see your point n! is > a^n for n>a/2 right? May30 comment factorial Vs power sequence you could give a simple proof, something like n! > (n/4)^n for n>5 maybe May30 asked factorial Vs power sequence