G.f.: A(x) = 1 + Sum_{n>=1} x^n*[ Product_{k=1..n} F_k(x) ] where F_n(x) = 1 + x*F_n(x)^n.
A131351
G.f.: A(x) = 1 + Sum_{n>=1} x^n*[ Product_{k=1..n} F_k(x) ] where F_n(x) = 1 + x*F_n(x)^n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =24a(6) =77a(7) =295a(8) =1329a(9) =6924a(10) =41030a(11) =272271a(12) =1996406a(13) =16000511a(14) =138953665a(15) =1298206570a(16) =12969761907a(17) =137846434950
External references
- oeis: A131351