OFFSET
0,4
COMMENTS
a(n) is divisible by (n-1) for n>1.
FORMULA
The g.f. of A120958 equals B(x) = series_reversion(x/A(x))/x, so that both A(x) = B(x/A(x)) and B(x) = A(x*B(x)) equivalently hold.
PROG
(PARI) {a(n)=local(A=[1, 1]); for(i=1, n, A=concat(A, 0); A[ #A]=(#A-2)*Vec(serreverse(x/Ser(A)))[ #A]); A[n+1]}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jul 21 2006
STATUS
approved