Number of 2 X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 0, 1 or 2 neighboring 1s.
A297375
Number of 2 X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 0, 1 or 2 neighboring 1s.
Terms
- a(0) =4a(1) =16a(2) =57a(3) =208a(4) =765a(5) =2807a(6) =10294a(7) =37759a(8) =138506a(9) =508054a(10) =1863591a(11) =6835838a(12) =25074539a(13) =91975917a(14) =337376860a(15) =1237532061a(16) =4539391360a(17) =16650941468a(18) =61077318469a(19) =224037712140a(20) =821792732873
External references
- oeis: A297375