A135949 a(n) = 5*a(n-2) + 2*a(n-3).

1, -1, 1, -3, 3, -13, 9, -59, 19, -277, -23, -1347, -669, -6781, -6039, -35243, -43757, -188293, -289271, -1028979, -1822941, -5723437, -11172663, -32263067, -67310189, -183660661, -401077079, -1052923683, -2372706717, -6066772573, -13969380951, -35079276299

Offset

0,4

Links

Table of n, a(n) for n=0..31.

Index entries for linear recurrences with constant coefficients, signature (0,5,2).

Formula

G.f.: (1-x-4x^2)/((1+2x)(1-2x-x^2)). - R. J. Mathar, Feb 07 2009

Mathematica

LinearRecurrence[{0, 5, 2}, {1, -1, 1}, 35] (* Paolo Xausa, Jan 29 2024 *)
CoefficientList[Series[(1 - x - 4 x^2)/((1 + 2 x) (1 - 2 x - x^2)), {x, 0, 40}], x] (* Wesley Ivan Hurt, Feb 22 2025 *)

Crossrefs

Sequence in context: A368960 A306529 A200921 * A168234 A141245 A147032

Adjacent sequences: A135946 A135947 A135948 * A135950 A135951 A135952

Keyword

sign,easy,changed

Author

Paul Curtz, Mar 02 2008

Extensions

More terms from R. J. Mathar, Feb 07 2009

a(30)-a(31) from Paolo Xausa, Jan 29 2024

Status

approved