A107546 Coordination sequence for B_13 lattice

1, 338, 21554, 548418, 7758530, 72431762, 495680562, 2668186562, 11873899778, 45303445330, 152290870706, 460565724866, 1273675451074, 3262741154194, 7822976222386, 17705155093314, 38088388507650, 78337815542610, 154794656025906, 295082861864258, 544593699459266

Offset

0,2

Links

Table of n, a(n) for n=0..20.

Index entries for linear recurrences with constant coefficients, signature (13,-78,286,-715,1287,-1716,1716,-1287,715,-286,78,-13,1).

Formula

G.f.: -(x^13 + 2613*x^12 + 79014*x^11 + 882310*x^10 + 4673955*x^9 + 13017303*x^8 + 20034276*x^7 + 17363268*x^6 + 8423415*x^5 + 2214355*x^4 + 294294*x^3 + 17238*x^2 + 325*x + 1) / (x - 1)^13. [Colin Barker, Nov 21 2012]

Crossrefs

Sequence in context: A232782 A035750 A186043 * A235880 A158000 A252447

Adjacent sequences: A107543 A107544 A107545 * A107547 A107548 A107549

Keyword

nonn,easy

Author

N. J. A. Sloane, May 29 2005

Status

approved