E.g.f. A(x) satisfies A(x) = exp( x^3 * A(x) / (1-x)^3 ) / (1-x).
A389870
E.g.f. A(x) satisfies A(x) = exp( x^3 * A(x) / (1-x)^3 ) / (1-x).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =12a(4) =144a(5) =1920a(6) =27000a(7) =425880a(8) =7842240a(9) =167348160a(10) =4021315200a(11) =106544592000
External references
- oeis: A389870