A156377 Numerator of Euler(n, 1/16).

1, -7, -15, 1001, 4065, -514087, -3125295, 559451081, 4534099905, -1044682551367, -10583199850575, 2980654783566761, 36234719616266145, -12060793477105158247, -171055019182265094255, 65695455336100321500041, 1064846988389856127270785

Offset

0,2

Links

T. D. Noe, Table of n, a(n) for n = 0..100

Formula

G.f.: conjecture T(0)/(1+7*x), where T(k) = 1 - 64*x^2*(k+1)^2/(64*x^2*(k+1)^2 + (1+7*x)^2/T(k+1) ); (continued fraction). - Sergei N. Gladkovskii, Nov 12 2013

a(n) = (-8)^n*skp(n, 7/8), where skp(n,x) are the Swiss-Knife polynomials A153641. - Peter Luschny, Apr 19 2014

Crossrefs

For denominators see A001025.

Sequence in context: A248275 A007541 A087485 * A069526 A061039 A258771

Adjacent sequences: A156374 A156375 A156376 * A156378 A156379 A156380

Keyword

sign,frac

Author

N. J. A. Sloane, Nov 07 2009

Status

approved