A025943 Expansion of 1/((1-2x)(1-3x)(1-7x)(1-8x)).

1, 20, 263, 2890, 28833, 271320, 2457211, 21670550, 187473605, 1598611300, 13480822719, 112690635330, 935435043817, 7720854845360, 63428474542787, 519059289782830, 4233894901355469, 34441103679651900

Offset

0,2

Links

Table of n, a(n) for n=0..17.

Index entries for linear recurrences with constant coefficients, signature (20,-137,370,-336).

Formula

a(n) = -2^(n+2)/15 +4*8^(n+2)/15 +3^(n+3)/20 -7^(n+3)/20. - R. J. Mathar, Jun 04 2013

Crossrefs

Sequence in context: A356837 A041764 A022111 * A025961 A208948 A278408

Adjacent sequences: A025940 A025941 A025942 * A025944 A025945 A025946

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved