6466460

Appears in sequences

• a(n) = (2*n+3)!/(6*n!*(n+1)!).at n=9A002802
• Triangle read by rows giving number of ways to glue sides of a 2n-gon so as to produce a surface of genus g.at n=37A035309
• Triangle read by rows: T(n,k) is the number of standard tableaux of shape (n,n,k) (0<=k<=n).at n=41A094236
• Denominator of partial sums of a certain series.at n=6A101628
• Denominators of 6*(sum(1/binomial(2*k,k),k=1..n)-1/3), n>=1.at n=9A130548
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having genus k (see first comment for definition of genus).at n=67A177267
• 2*A002740(n).at n=12A217213
• Triangle read by rows in which row(n) = {T(n, k)} is the lexicographically earliest list of n numbers such that adding 1 to some T(n, k) gives a row of numbers each divisible by prime(k).at n=29A286947
• a(n) is the number of rooted maps with n edges and 10 faces on an orientable surface of genus 1.at n=0A288074
• Denominators of Integral_{x=0..1} P(n, x)^3 with P(n, x) = Sum_{k=0..n}(-1)^(n-k)* Stirling2(n, k)*k!*x^k.at n=6A291450
• Table read by rows. Number of set partitions of [n] with respect to genus g.at n=39A370235