OFFSET
2,2
FORMULA
Expansion of (1+x^2*C^4)*C^3, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.
Conjecture: -(n+3)*(11*n-38)*a(n) +2*(35*n^2-86*n-102)*a(n-1) -4*(13*n-30)*(2*n-5)*a(n-2)=0. - R. J. Mathar, Jun 22 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Definition corrected by Herbert Kociemba, May 02 2004
STATUS
approved