G.f. satisfies: A(x) = Sum_{n>=0} x^n*(1 + n*x)^n * A(x)^n / (1 + x*A(x) + n*x^2*A(x))^n.
A222589
G.f. satisfies: A(x) = Sum_{n>=0} x^n*(1 + n*x)^n * A(x)^n / (1 + x*A(x) + n*x^2*A(x))^n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =41a(6) =128a(7) =409a(8) =1355a(9) =4564a(10) =15728a(11) =54904a(12) =194740a(13) =698042a(14) =2532483a(15) =9270351a(16) =34268276a(17) =127677731a(18) =479723132a(19) =1815553953a(20) =6923744832a(21) =26587139445a(22) =102838915279a(23) =400513959602
External references
- oeis: A222589