OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (25, -220, 780, -864).
FORMULA
a(n) = -2^n/21 +9*6^n -128*8^n/3 +243*9^n/7. - R. J. Mathar, Jun 30 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved