OFFSET
0,2
FORMULA
Recursion: see Maple program.
a(n) = A282869(2n,n).
MAPLE
a:= proc(n) option remember; `if`(n<3, 1+n^2, ((512*(2*n-5))
*(2519*n-1279)*(n-2)*(2*n-3)*a(n-3) +(192*(2*n-3))
*(1710*n^3-443*n^2-4990*n+2483)*a(n-2) -(24*(22671*n^4
-124866*n^3+216436*n^2-129032*n+24526))*a(n-1))
/ ((3*n+2)*(27*n+9)*(855*n-1504)*n))
end:
seq(a(n), n=0..30);
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Mar 16 2017
STATUS
editing