G.f. satisfies: 13*A(x) = 12 + 27*x + A(x)^4, starting with [1,3,6].
A120595
G.f. satisfies: 13*A(x) = 12 + 27*x + A(x)^4, starting with [1,3,6].
Terms
- a(0) =1a(1) =3a(2) =6a(3) =36a(4) =249a(5) =1932a(6) =16044a(7) =139500a(8) =1253934a(9) =11558316a(10) =108658902a(11) =1037800920a(12) =10041891132a(13) =98230257636a(14) =969814634424
External references
- oeis: A120595