a(n) = n-fold Dumont operator of x evaluated at x=y=1, z=3.
A143523
a(n) = n-fold Dumont operator of x evaluated at x=y=1, z=3.
Terms
- a(0) =1a(1) =3a(2) =10a(3) =42a(4) =248a(5) =1992a(6) =19600a(7) =222288a(8) =2851712a(9) =41075328a(10) =658359040a(11) =11621260032a(12) =223832419328
External references
- oeis: A143523