OFFSET
0,1
LINKS
Index entries for linear recurrences with constant coefficients, signature (5, -10, 10, -5, 1).
FORMULA
a(0)=81, a(1)=2401, a(2)=14641, a(3)=50625, a(4)=130321, a(n)=5*a(n-1)- 10*a(n-2)+10*a(n-3)-5*a(n-4)+a(n-5) [From Harvey P. Dale, Dec 08 2011]
MATHEMATICA
(4*Range[0, 30]+3)^4 (* or *) LinearRecurrence[{5, -10, 10, -5, 1}, {81, 2401, 14641, 50625, 130321}, 30] (* Harvey P. Dale, Dec 08 2011 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved