Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 1 1 vertically.
A207340
Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 1 1 vertically.
Terms
- a(0) =2a(1) =16a(2) =84a(3) =828a(4) =9668a(5) =128292a(6) =2367656a(7) =53882188a(8) =1466226618a(9) =53206438448
External references
- oeis: A207340