OFFSET
0,9
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Dhruv Mubayi, Counting substructures II: Hypergraphs, Combinatorica 33 (2013), no. 5, 591--612. MR3132928.
Index entries for linear recurrences with constant coefficients, signature (1,4,-4,-6,6,4,-4,-1,1).
FORMULA
G.f.: -x^7*(4*x+1) / ((x-1)^5*(x+1)^4). - Colin Barker, Jan 02 2014
a(n) = (2*n - 1 + (-1)^n)*(2*n - 5 + (-1)^n)*(2*n - 9 + (-1)^n)*(10*n - 57 - 3*(-1)^n)/6144. - Luce ETIENNE, Nov 18 2017
MATHEMATICA
CoefficientList[Series[-x^7 (4 x + 1)/((x - 1)^5 (x + 1)^4), {x, 0, 40}], x] (* Vincenzo Librandi Feb 01 2014 *)
LinearRecurrence[{1, 4, -4, -6, 6, 4, -4, -1, 1}, {0, 0, 0, 0, 0, 0, 0, 1, 5}, 60] (* Harvey P. Dale, Jun 27 2020 *)
PROG
(PARI) Vec(-x^7*(4*x+1)/((x-1)^5*(x+1)^4) + O(x^100)) \\ Colin Barker, Jan 02 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Dec 27 2013
STATUS
approved