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.
A251254
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.
Terms
- a(0) =84a(1) =446a(2) =1770a(3) =9130a(4) =38332a(5) =192442a(6) =836546a(7) =4112126a(8) =18298862a(9) =88585834a(10) =400512170a(11) =1918066656a(12) =8765618868a(13) =41663142968a(14) =191790556024a(15) =906821509892
External references
- oeis: A251254