OFFSET
0,3
EXAMPLE
See examples given in A137984.
PROG
(PARI) {a(n)=local(A=1+2^n*x+x*O(x^n)); for(i=0, n, A=1/(1-2^(n-i)*x*A^(1/2^(n-i))+x*O(x^n))); polcoeff(A, n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Feb 27 2008
STATUS
approved