Number of 4Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s.
A297509
Number of 4Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s.
Terms
- a(0) =1a(1) =87a(2) =531a(3) =2281a(4) =23348a(5) =191192a(6) =1247716a(7) =9450219a(8) =74086027a(9) =542295341a(10) =4014135733a(11) =30366147431a(12) =226985241429
External references
- oeis: A297509