One half of fourth column of triangle A075181.
A075184
One half of fourth column of triangle A075181.
Terms
- a(0) =3a(1) =50a(2) =675a(3) =8820a(4) =117600a(5) =1632960a(6) =23814000a(7) =365904000a(8) =5927644800a(9) =101189088000
External references
- oeis: A075184