Number of n X n binary matrices with every 1 adjacent to some 0 horizontally, vertically, diagonally or antidiagonally.
A133791
Number of n X n binary matrices with every 1 adjacent to some 0 horizontally, vertically, diagonally or antidiagonally.
Terms
- a(0) =1a(1) =15a(2) =417a(3) =50625a(4) =24879489a(5) =48231228511
External references
- oeis: A133791