Number of n X 3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.
A297514
Number of n X 3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.
Terms
- a(0) =3a(1) =17a(2) =49a(3) =177a(4) =727a(5) =2445a(6) =8931a(7) =33841a(8) =120079a(9) =438161a(10) =1618767a(11) =5849585a(12) =21333063a(13) =78146401a(14) =284124279a(15) =1036090465a(16) =3784306647a(17) =13787045553a(18) =50277043559a(19) =183451730433a(20) =668806025271
External references
- oeis: A297514