OFFSET
0,2
LINKS
T. D. Noe, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (11,-55,165,-330,462,-462,330,-165,55,-11,1).
FORMULA
a(n)=(n+4)*(8*n^2+64*n+45)*binomial(n+7, 7)/(4*45).
G.f.: (1+15*x+15*x^2+x^3)/(1-x)^11.
MATHEMATICA
LinearRecurrence[{11, -55, 165, -330, 462, -462, 330, -165, 55, -11, 1}, {1, 26, 246, 1442, 6292, 22374, 68354, 185614, 458601, 1048476, 2246244}, 30] (* Harvey P. Dale, Feb 22 2023 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Apr 06 2001
STATUS
approved