Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000011.
A259886
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000011.
Terms
- a(0) =34a(1) =174a(2) =3511a(3) =58800a(4) =863502a(5) =36899517a(6) =2374588015a(7) =164942896153
External references
- oeis: A259886