OFFSET
0,9
LINKS
Index entries for linear recurrences with constant coefficients, signature (2, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -2, 1).
FORMULA
a(n) = +2*a(n-1) -a(n-2) +a(n-23) -2*a(n-24) +a(n-25). [From R. J. Mathar, Apr 15 2010]
G.f: -((x^6 (1+x^2) (1+(-1+x) x (1+x) (1+(-1+x) x) (1+x+x^7)))/(-1+x (2+x (-1+(-1+x)^2 x^21)))) Peter J. C. Moses, Jun 01 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved