OFFSET
0,2
LINKS
Paolo Xausa, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1).
FORMULA
a(0)=1, a(1)=4826809, a(2)=244140625, a(3)=2565726409, a(4)=13841287201, a(5)=51520374361, a(6)=151334226289, a(n)=7*a(n-1)-21*a(n-2)+ 35*a(n-3)- 35*a(n-4)+21*a(n-5)-7*a(n-6)+a(n-7). - Harvey P. Dale, Jan 14 2013
MATHEMATICA
(12*Range[0, 20]+1)^6 (* or *) LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {1, 4826809, 244140625, 2565726409, 13841287201, 51520374361, 151334226289}, 20](* Harvey P. Dale, Jan 14 2013 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved