G.f. A(x) satisfies: A(x)^2 = A( x^2/(1-6*x) ), with A(0) = 0.
A264225
G.f. A(x) satisfies: A(x)^2 = A( x^2/(1-6*x) ), with A(0) = 0.
Terms
- a(0) =1a(1) =3a(2) =15a(3) =81a(4) =462a(5) =2718a(6) =16344a(7) =99900a(8) =618567a(9) =3870909a(10) =24441021a(11) =155510523a(12) =996109245a(13) =6418243575a(14) =41572149615a(15) =270536350545
External references
- oeis: A264225