OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (27, -251, 957, -1260).
FORMULA
a(0)=1, a(1)=27, a(2)=478, a(3)=7086, a(n)=27*a(n-1)-251*a(n-2)+ 957*a(n-3)- 1260*a(n-4) [From Harvey P. Dale, Aug 31 2011]
a(n)=(8*12^(n+3)-9*7^(n+4)+18*5^(n+4)-35*3^(n+3))/2520. [Yahia Kahloune, Jun 08 2013]
MATHEMATICA
CoefficientList[Series[1/((1-3x)(1-5x)(1-7x)(1-12x)), {x, 0, 20}], x] (* or *) LinearRecurrence[{27, -251, 957, -1260}, {1, 27, 478, 7086}, 20] (* Harvey P. Dale, Aug 31 2011 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved