-2223
domain: Z
Appears in sequences
- Expansion of Product_{k>=1} (1-x^k)^27.at n=3A010832
- Inverse of Riordan array (1/(1-x), x/(1-x)^3), A109955.at n=51A109956
- Riordan array (1/(1+3x+2x^2),x/(1+3x+2x^2)).at n=30A111806
- a(n) = [x^n] eta(x)^(3^n).at n=3A158113
- a(n) = -(n - 4)*(n - 5)*(n - 12)/6.at n=25A167541
- Triangle T(n,k), n>=0, 0<=k<=3n, read by rows: row n gives the coefficients of the chromatic polynomial of the complete tripartite graph K_(n,n,n), highest powers first.at n=15A212220
- Values of n such that L(7) and N(7) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=27A226927