Expansion of Product_{j>=1} (1 + (-1 + Product_{k>=1} (1 + x^k)^k)^j)^j.
A307323
Expansion of Product_{j>=1} (1 + (-1 + Product_{k>=1} (1 + x^k)^k)^j)^j.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =18a(4) =74a(5) =303a(6) =1206a(7) =4741a(8) =18466a(9) =71463a(10) =274879a(11) =1051509a(12) =4001727a(13) =15157935a(14) =57170668a(15) =214787989a(16) =804049797a(17) =2999846236a(18) =11156943967a(19) =41370989836a(20) =152973793900a(21) =564117250793
External references
- oeis: A307323