Number of n X n symmetric binary matrices with each 1 adjacent to no more than 4 king-move neighboring 1's.
A191480
Number of n X n symmetric binary matrices with each 1 adjacent to no more than 4 king-move neighboring 1's.
Terms
- a(0) =2a(1) =8a(2) =51a(3) =624a(4) =14937a(5) =660986a(6) =54708660a(7) =8491650283
External references
- oeis: A191480