OFFSET
0,2
FORMULA
a(n) = A134087(n)/2^n.
PROG
(PARI) {a(n)=local(A=[1], B); for(i=1, n, A=concat(A, 0); B=Vec(Ser(A)^(2^(#A-2))); A[ #A]=(B[ #B-1]-B[ #B])/2^(#A-2)); Vec(Ser(A)^(2^(n+1)))[n+1]/2^n}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Oct 26 2007
STATUS
approved