A351780 a(n) = n! * Sum_{k=0..n} (-k)^(n-k) * (n-k)^k/k!.

1, 0, -2, 6, 108, -2420, 8730, 1313718, -57930152, 567983736, 109544982390, -9917916180590, 321821829728388, 32383946348733252, -6591798188344856942, 531702135210365508270, 11136706526396459006640

Offset

0,3

Links

Table of n, a(n) for n=0..16.

Prog

(PARI) a(n) = n!*sum(k=0, n, (-k)^(n-k)*(n-k)^k/k!);

Crossrefs

Cf. A351768, A351779.

Sequence in context: A357090 A181036 A222854 * A059088 A216151 A057771

Adjacent sequences: A351777 A351778 A351779 * A351781 A351782 A351783

Keyword

sign

Author

Seiichi Manyama, Feb 19 2022

Status

approved