OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (36,-473,2670,-5400)
FORMULA
a(n) = 22*a(n-1) - 120*a(n-2) + (9^(n+1) - 5^(n+1))/4, n >= 2. - Vincenzo Librandi, Mar 12 2011
a(n) = -5^(n+2)/28 - 10^(n+2) + 2*12^(n+2)/7 + 3*9^(n+2)/4. - R. J. Mathar, Mar 18 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved