OFFSET
0,3
COMMENTS
It would be nice to have a formula for the 2^(n-1)th coefficient.
The exponent of x in P(n) with a(n) as coefficient is {1,1,2,5,9,19,37,74,147,294,587,1175,...}.
PROG
(PARI) P(n)=if(n<1, x, P(n-1)*(P(n-1)+1))
(PARI) a(n)=vecmax(Vec(P(n)))
CROSSREFS
KEYWORD
nonn
AUTHOR
Ralf Stephan, Apr 02 2004
STATUS
approved