Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010001.
A260199
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010001.
Terms
- a(0) =26a(1) =80a(2) =685a(3) =5998a(4) =85168a(5) =1819901a(6) =52387329a(7) =2215046304a(8) =135612260310
External references
- oeis: A260199