OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (23,-187,633,-756).
FORMULA
a(n)=(2*9^(n+3)-5*7^(n+3)+8*4^(n+3)-5*3^(n+3))/120. [Yahia Kahloune, May 31 2013]
MATHEMATICA
CoefficientList[Series[1/((1-3x)(1-4x)(1-7x)(1-9x)), {x, 0, 30}], x] (* or *) LinearRecurrence[ {23, -187, 633, -756}, {1, 23, 342, 4198}, 30] (* Harvey P. Dale, Sep 18 2022 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved