Third column of A154921.
A154931
Third column of A154921.
Terms
- a(0) =1a(1) =3a(2) =18a(3) =130a(4) =1125a(5) =11361a(6) =131124a(7) =1702548a(8) =24562575a(9) =389799355a(10) =6748339158a(11) =126565340694
External references
- oeis: A154931
A154931
Third column of A154921.