Number of n X n binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.
A268988
Number of n X n binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =2a(1) =13a(2) =174a(3) =6009a(4) =421450a(5) =66954420a(6) =22995344760
External references
- oeis: A268988