Number of nX4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.
A297515
Number of nX4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.
Terms
- a(0) =4a(1) =33a(2) =128a(3) =624a(4) =3383a(5) =16173a(6) =80436a(7) =406779a(8) =2013490a(9) =10037118a(10) =50164575a(11) =249805967a(12) =1245550598a(13) =6212873729a(14) =30971037656a(15) =154425242048a(16) =770028394901
External references
- oeis: A297515