Number of nX4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s.
A297540
Number of nX4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s.
Terms
- a(0) =1a(1) =24a(2) =93a(3) =275a(4) =2205a(5) =13248a(6) =67215a(7) =401415a(8) =2403621a(9) =13717554a(10) =79734011a(11) =467605069a(12) =2718919839a(13) =15817878296a(14) =92253538261a(15) =537481451021
External references
- oeis: A297540