Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 4 neighboring 1's.
A296535
Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 4 neighboring 1's.
Terms
- a(0) =1a(1) =3a(2) =16a(3) =126a(4) =2104a(5) =78660a(6) =5705431a(7) =820373528a(8) =239372827502
External references
- oeis: A296535