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
Keywords
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).
Crossrefs
Self-convolution of A306463.
Programs
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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))
Formula
a(n) = 2*a(n-1) + a(n-2) + 4*a(n-3) + a(n-4) - 2*a(n-5) - a(n-6).