Number of n X 2 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 1 or 3 neighboring 1s.
A296572
Number of n X 2 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 1 or 3 neighboring 1s.
Terms
- a(0) =4a(1) =11a(2) =31a(3) =90a(4) =254a(5) =728a(6) =2078a(7) =5931a(8) =16941a(9) =48360a(10) =138093a(11) =394288a(12) =1125795a(13) =3214477a(14) =9178177a(15) =26206271a(16) =74826094a(17) =213649101a(18) =610027119a(19) =1741795342a(20) =4973305753a(21) =14200157940a(22) =40545363081a(23) =115768182159a(24) =330550053876a(25) =943811471644
External references
- oeis: A296572