OFFSET
0,3
COMMENTS
FORMULA
a(n) is divisible by n for n>=1.
EXAMPLE
a(n)/n = [1,1,3,18,176,2491,47311,1144748,33986636,1203643060,...] for n>=1.
PROG
(PARI) {a(n)=local(ROW=1+x+x*O(x^n)); for(i=0, n, ROW=1+x*ROW^(n+2)*deriv(x/ROW)); polcoeff(ROW, n)}
for(n=0, 20, print1(a(n), ", "))
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Mar 03 2012
STATUS
approved