Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000101.
A259947
Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000101.
Terms
- a(0) =156a(1) =549a(2) =2438a(3) =8699a(4) =30351a(5) =115410a(6) =438353a(7) =1615572a(8) =5983278a(9) =22387088a(10) =83497726a(11) =310419235a(12) =1155916673a(13) =4308316980a(14) =16046423584a(15) =59751346761a(16) =222558385418a(17) =829007147866
External references
- oeis: A259947