Number of nX4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.
A297716
Number of nX4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.
Terms
- a(0) =7a(1) =83a(2) =523a(3) =4212a(4) =34319a(5) =268630a(6) =2139403a(7) =17031173a(8) =135252357a(9) =1075372808a(10) =8549266704a(11) =67957631430a(12) =540234143744
External references
- oeis: A297716