A306504 Expansion of 1/(x^6+2*x^5-x^4-4*x^3-x^2-2*x+1).

1, 2, 5, 16, 46, 128, 366, 1048, 2983, 8498, 24235, 69088, 196924, 561360, 1600252, 4561680, 13003565, 37068242, 105667377, 301217072, 858654442, 2447694896, 6977439850, 19890006440, 56698785235, 161626505250, 460735217111, 1313379512256, 3743941595128, 10672542499296

Offset

0,2

Links

Seiichi Manyama, Table of n, a(n) for n = 0..2000

Index entries for linear recurrences with constant coefficients, signature (2,1,4,1,-2,-1).

Formula

a(n) = 2*a(n-1) + a(n-2) + 4*a(n-3) + a(n-4) - 2*a(n-5) - a(n-6).

Prog

(PARI) N=66; x='x+O('x^N); Vec(1/(x^6+2*x^5-x^4-4*x^3-x^2-2*x+1))

Crossrefs

Self-convolution of A306463.

Sequence in context: A138573 A148375 A075887 * A148376 A148377 A349270

Adjacent sequences: A306501 A306502 A306503 * A306505 A306506 A306507

Keyword

nonn

Author

Seiichi Manyama, Feb 20 2019

Status

approved