Number of nX3 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.
A296638
Number of nX3 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.
Terms
- a(0) =4a(1) =28a(2) =132a(3) =671a(4) =3444a(5) =17558a(6) =89613a(7) =457188a(8) =2333009a(9) =11905494a(10) =60751194a(11) =310004765a(12) =1581914211a(13) =8072288131a(14) =41191772847a(15) =210195946958
External references
- oeis: A296638