37191
domain: N
Appears in sequences
- 4-dimensional figurate numbers: a(n) = n*binomial(n+2, 3).at n=20A002417
- Expansion of (1-x)^(-3) * (1-x^2)^(-2).at n=40A002624
- Square root of A030681.at n=29A030682
- Triangle read by rows: T(n,k) is the number of permutations p of [n] such that the length of the longest 2-stack sortable initial segment of p is equal to k.at n=43A094785
- Bisection of A002417.at n=10A100430
- a(n)=4n^4-3n^3+2n^2-n+1.at n=10A131465
- The Wiener index of the Kneser graph K(n,2) (n>=5).at n=18A228306
- Number of ways to place 2 points on a triangular grid of side n so that they are not adjacent.at n=21A239568
- Number of quadrangulations of a hexagon having n inner faces.at n=8A242637
- 26-gonal pyramidal numbers: a(n) = n*(n+1)*(8*n-7)/2.at n=21A256646