Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001001.
A259954
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001001.
Terms
- a(0) =34a(1) =146a(2) =1603a(3) =22622a(4) =501606a(5) =17818241a(6) =949570630a(7) =77682624194
External references
- oeis: A259954