G.f. A(x) satisfies: A(x) = Sum_{n>=0} x^n * (A(x) - x^n)^n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =9a(5) =28a(6) =86a(7) =265a(8) =855a(9) =2783a(10) =9214a(11) =30867a(12) =104481a(13) =356859a(14) =1228064a(15) =4254760a(16) =14827717a(17) =51944178a(18) =182819043a(19) =646128479a(20) =2292209747a(21) =8159722774a(22) =29137365046a(23) =104343145880a(24) =374640974686