OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (21, -156, 476, -480).
FORMULA
a(n) = (2*8^(n+3)-9*6^(n+3)+8*5^(n+3)-2^(n+3))/72. [Yahia Kahloune, May 25 2013]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved