OFFSET
0,3
COMMENTS
Hankel transform is A167752.
FORMULA
G.f.: 1/(1-x/(1-x/(1-x^2/(1-x^3/(1-x^4/(1-...)))))) (continued fraction);
G.f.: 1/(1-x*f(x)), f(x) the g.f. of A005169.
EXAMPLE
G.f. = 1 + x + 2*x^2 + 4*x^3 + 9*x^4 + 20*x^5 + 45*x^6 + 102*x^7 + ...
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Nov 10 2009
STATUS
approved