E.g.f. satisfies A(x) = exp(x^3*A(x)) / (1-x).

A371039

E.g.f. satisfies A(x) = exp(x^3*A(x)) / (1-x).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =12a(4) =72a(5) =480a(6) =4680a(7) =52920a(8) =645120a(9) =9313920a(10) =153014400a(11) =2720995200a(12) =53428636800

External references