OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (20,-137,370,-336).
FORMULA
a(n) = -2^(n+2)/15 +4*8^(n+2)/15 +3^(n+3)/20 -7^(n+3)/20. - R. J. Mathar, Jun 04 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved