G.f. satisfies: A(x) = Sum_{n>=0} x^n*[Sum_{k=0..n} C(n,k)^3 *x^k* A(x)^k].
A186097
G.f. satisfies: A(x) = Sum_{n>=0} x^n*[Sum_{k=0..n} C(n,k)^3 *x^k* A(x)^k].
Terms
- a(0) =1a(1) =1a(2) =2a(3) =10a(4) =39a(5) =147a(6) =639a(7) =2857a(8) =12725a(9) =58081a(10) =270250a(11) =1268444a(12) =6009439a(13) =28736727a(14) =138401100a(15) =670641714a(16) =3268021317a(17) =16004012529a(18) =78716657052a(19) =388701645264
External references
- oeis: A186097