OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (9,-36,84,-126,126,-84,36,-9,1).
FORMULA
G.f.: -(2*x^9-15*x^8+47*x^7-78*x^6+65*x^5-10*x^4-26*x^3+25*x^2-6*x+1)/(x-1)^9.
MAPLE
a:= n-> `if`(n=0, 1, 3+((((((((5*n+100)*n+826)*n+4984)*n+15925)*n
+20020)*n-16756)*n-25104)*n)/40320):
seq(a(n), n=0..35);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Alois P. Heinz, Feb 09 2019
STATUS
approved