OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (19,-121,309,-270).
FORMULA
a(0)=1, a(1)=19, a(2)=240; a(n)=(9^(n+3)-7*5^(n+3)+14*3^(n+3)-8*2^(n+3))/168. [Yahia Kahloune, May 08 2013]
MATHEMATICA
CoefficientList[Series[1/((1-2x)(1-3x)(1-5x)(1-9x)), {x, 0, 20}], x] (* or *) LinearRecurrence[{19, -121, 309, -270}, {1, 19, 240, 2570}, 30] (* Harvey P. Dale, Dec 26 2021 *)
PROG
(PARI) x='x+O('x^66); Vec(1/((1-2*x)*(1-3*x)*(1-5*x)*(1-9*x))) \\ Joerg Arndt, May 08 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved