A396404 Antidiagonal sums of A396403.

1, 2, 2, 3, 5, 14, 98, 1825, 96047, 17510486, 11812343118, 27374136605275, 222664721332941725, 7713990062901393179010, 1426947380810639117373797622, 1357409393633769232491271110057841, 5738600778451325326403002674151089272559, 104928848682175336462930945021069009612321519746

Offset

0,2

Links

Table of n, a(n) for n=0..17.

Mathematica

Unprotect[Power]; Power[0, 0]=1; Protect[Power]; A396403[n_, k_]:= k^(n*(n-1)/2); a[n_]:=Sum[A396403[n-k, k], {k, 0, n}]; Array[a, 18, 0]

Crossrefs

Cf. A396403.

Sequence in context: A152446 A265789 A055937 * A090255 A228162 A376190

Adjacent sequences: A396401 A396402 A396403 * A396405 A396406 A396407

Keyword

nonn

Author

Stefano Spezia, May 24 2026

Status

approved