OFFSET
0,2
LINKS
Matthew House, Table of n, a(n) for n = 0..1040
Index entries for linear recurrences with constant coefficients, signature (25,-215,695,-504).
FORMULA
G.f.: 1/((1-x)(1-7x)(1-8x)(1-9x)).
a(n) = (21*9^(n+3) - 6*8^(n+4) + 4*7^(n+4) - 1)/336. - Yahia Kahloune, Jun 28 2013
a(n) = 25*a(n-1) - 215*a(n-2) + 695*a(n-3) - 504*a(n-4). - Matthew House, Jan 16 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved