Column 1 of triangle A102920, which equals the matrix square of A102098.
A102922
Column 1 of triangle A102920, which equals the matrix square of A102098.
Terms
- a(0) =0a(1) =4a(2) =40a(3) =1128a(4) =61120a(5) =5466320a(6) =735847800a(7) =139910204080
External references
- oeis: A102922