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

0,3

Links

Table of n, a(n) for n=0..26.

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]

Crossrefs

Cf. A380747.

Sequence in context: A149952 A337526 A346661 * A060049 A107590 A245311

Adjacent sequences: A380745 A380746 A380747 * A380751 A380752 A380753

Keyword

nonn

Author

Stefano Spezia, Jan 31 2025

Status

approved