OFFSET
0,2
FORMULA
G.f. 1/G(0) where G(k) = 1 - x*(2*k+1)*(2*k+2)/(1 - (2*k+2)^2*x/G(k+1)); (continued fraction, 2-step). - Sergei N. Gladkovskii, Aug 11 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
Ralf Stephan, Sep 07 2004
STATUS
approved