A380748 Antidiagonal sums of A380747.

1, 0, 2, 5, 15, 50, 180, 695, 2869, 12616, 58862, 290305, 1508483, 8233942, 47086560, 281420499, 1753994617, 11377449948, 76667702218, 535802458029, 3877528409495, 29016786672794, 224243915547756, 1787491551588239, 14680196745177309, 124088256248966864, 1078492866534953734

Offset: 0

Author

Stefano Spezia, Jan 31 2025

Keywords

• nonn

Crossrefs

Cf. A380747.

Programs

Mathematica

A380747[0, 0]:=1; A380747[1, 0]:=-1; A380747[n_, k_]:=((k-1)*n+k)k^(n-1); a[n_]:=Sum[A[n-k,k],{k,0,n}]; Array[a,27,0]