OFFSET
0,3
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..310
PROG
(PARI) {a(n)=local(A=1+x+x*O(x^n)); for(i=0, n, A=1+subst(x*A^2, x, x+x^2)); polcoeff(A, n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jan 28 2007
STATUS
approved