Number of n X n symmetric binary matrices with each 1 adjacent to no more than 4 knight-move neighboring 1s.
A191572
Number of n X n symmetric binary matrices with each 1 adjacent to no more than 4 knight-move neighboring 1s.
Terms
- a(0) =2a(1) =8a(2) =64a(3) =1024a(4) =24975a(5) =1117404a(6) =98925520a(7) =16397607520
External references
- oeis: A191572