-1721
domain: Z
Appears in sequences
- Row sums of a number triangle related to the Pell numbers.at n=41A110331
- a(n) = (n^5 - 133*n^4 + 6729*n^3 - 158379*n^2 + 1720294*n - 6823316)/4.at n=21A121887
- a(n) = 7 + 12*n - 6*n^2.at n=18A157517
- Triangle T(n,k) = A015442(k) - A015442(n) + A015442(n-k) read by rows.at n=30A176264
- Triangle T(n,k) = A015442(k) - A015442(n) + A015442(n-k) read by rows.at n=33A176264
- Dirichlet g.f.: zeta(s) / (zeta(s-1) * zeta(s-2)).at n=40A351654