A259861 a(n+8)+34*a(n+4)+a(n)=0 with a(0)-a(7) as shown.

2, 2, -5, -29, -70, -70, 169, 985, 2378, 2378, -5741, -33461, -80782, -80782, 195025, 1136689, 2744210, 2744210, -6625109, -38613965, -93222358, -93222358, 225058681, 1311738121, 3166815962, 3166815962, -7645370045, -44560482149, -107578520350, -107578520350

Offset: 0

Author

N. J. A. Sloane, Jul 08 2015

Keywords

• sign
• easy

Links

• Colin Barker, Table of n, a(n) for n = 0..1000
• J. Riordan, The distribution of crossings of chords joining pairs of 2n points on a circle, Math. Comp., 29 (1975), 215-222.
• J. Riordan, The distribution of crossings of chords joining pairs of 2n points on a circle, Math. Comp., 29 (1975), 215-222. [Annotated scanned copy]
• Index entries for linear recurrences with constant coefficients, signature (4,-8,4,-1).

Crossrefs

Cf. A259860.

Programs

PARI

Vec(-(x^3-3*x^2+6*x-2)/(x^4-4*x^3+8*x^2-4*x+1) + O(x^50)) \\ Colin Barker, Jul 09 2015

Formula

G.f.: -(x^3-3*x^2+6*x-2) / (x^4-4*x^3+8*x^2-4*x+1). - Colin Barker, Jul 09 2015