Number of n X n binary arrays with each 1 adjacent to exactly two 0's.
A183329
Number of n X n binary arrays with each 1 adjacent to exactly two 0's.
Terms
- a(0) =1a(1) =7a(2) =26a(3) =247a(4) =4643a(5) =135578a(6) =7279940a(7) =684911503a(8) =111613234643
External references
- oeis: A183329