G.f. satisfies: A(x) = Sum_{n>=0} x^n*[Sum_{k=0..n} C(n,k)^3 *x^k* A(x)^(2k)].
A187000
G.f. satisfies: A(x) = Sum_{n>=0} x^n*[Sum_{k=0..n} C(n,k)^3 *x^k* A(x)^(2k)].
Terms
- a(0) =1a(1) =1a(2) =2a(3) =11a(4) =50a(5) =216a(6) =1062a(7) =5457a(8) =28088a(9) =147686a(10) =792716a(11) =4303036a(12) =23587816a(13) =130552984a(14) =728316462a(15) =4090107939a(16) =23106799662a(17) =131234374020a(18) =748839982332
External references
- oeis: A187000