A343472 G.f.: 1 + 1!*x/(1 + 2!*x^2/(1 + 3!*x^3/(1 + 4!*x^4/(1 + 5!*x^5/(1 + ...))))).

1, 1, 0, -2, 0, 4, 12, -8, -48, -56, -144, 400, 1200, 1792, 960, 16864, -34560, -170816, -320064, -632960, -869376, -15780224, 30636288, 144493312, 360770304, 738095104, 2382729216, 6661606912, 81815537664, -152267942912, -883849860096, -2187970242560, -6499788165120

Offset

0,4

Links

Table of n, a(n) for n=0..32.

Prog

(PARI) a(n) = my(A=1+O(x)); for(i=1, n, A=1+(n-i+1)!*x^(n-i+1)/A); polcoef(A, n);

Crossrefs

Cf. A285381, A343428.

Sequence in context: A378853 A359188 A361269 * A214199 A320491 A295907

Adjacent sequences: A343469 A343470 A343471 * A343473 A343474 A343475

Keyword

sign

Author

Seiichi Manyama, Apr 16 2021

Status

approved