A343473 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, -4, 0, 16, 108, -64, -864, -2660, -22464, 33968, 272268, 1217152, 4629312, 68208188, -98077824, -1089798320, -5246016084, -32436365248, -180561473568, -3404617719332, 5203858765248, 55902314446832, 354805454664396, 2229923884913920

Offset

0,4

Links

Table of n, a(n) for n=0..25.

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. A343420, A343427.

Sequence in context: A247120 A002979 A137279 * A375992 A233807 A302771

Adjacent sequences: A343470 A343471 A343472 * A343474 A343475 A343476

Keyword

sign

Author

Seiichi Manyama, Apr 16 2021

Status

approved