OFFSET
0,4
COMMENTS
A097088 lists the reduced numerators.
FORMULA
G.f.: A(x) = Sum_{n>=0} A097088(n)/2^a(n) where A(A(x)) = x + x^2.
PROG
(PARI) {a(n)=local(A, B, F=x+x^2+x*O(x^n)); A=F; if(n==0, 0, for(i=0, n, B=serreverse(A); A=(A+subst(B, x, F))/2); valuation(denominator(polcoeff(A, n, x)), 2))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jul 23 2004
STATUS
approved