Number of 7Xn 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
A269058
Number of 7Xn 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =2187a(1) =29646a(2) =464250a(3) =9779808a(4) =187575858a(5) =3726221592a(6) =71430596250
External references
- oeis: A269058