A373658 a(n) = Sum_{k=0..n} binomial(n, k)*A050446(n, n - k). Alternating row sums of A373660.

1, 3, 13, 88, 749, 8128, 105453, 1606368, 28047561, 552980736, 12149820237, 294451219712, 7803392603109, 224513730740224, 6969658947747357, 232210548740331008, 8265038127738534417, 312994090288528379904, 12565925964816171109069, 533124629548518534705152

Offset

0,2

Links

Table of n, a(n) for n=0..19.

Maple

a := n -> local k; add(binomial(n, k) * A050446(n, n - k), k = 0..n):
seq(a(n), n = 0..19);

Crossrefs

Cf. A050446, A373660.

Sequence in context: A244755 A002725 A324028 * A097711 A114477 A345104

Adjacent sequences: A373655 A373656 A373657 * A373659 A373660 A373661

Keyword

nonn

Author

Peter Luschny, Jun 13 2024

Status

approved