Number of (n+1)X(4+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge or main diagonally.
A251288
Number of (n+1)X(4+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge or main diagonally.
Terms
- a(0) =125a(1) =701a(2) =3390a(3) =18924a(4) =94706a(5) =518711a(6) =2645966a(7) =14292754a(8) =73763850a(9) =394839392a(10) =2052818979a(11) =10924134430a(12) =57063130832a(13) =302529963932
External references
- oeis: A251288