Number of nX4 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 3 neighboring 1s.
A296401
Number of nX4 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 3 neighboring 1s.
Terms
- a(0) =1a(1) =17a(2) =82a(3) =444a(4) =2868a(5) =17783a(6) =110554a(7) =688248a(8) =4288144a(9) =26711200a(10) =166398828a(11) =1036671655a(12) =6458139283a(13) =40233032157a(14) =250644098773
External references
- oeis: A296401