Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001.
A260536
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001.
Terms
- a(0) =40a(1) =131a(2) =774a(3) =2775a(4) =9184a(5) =50674a(6) =219852a(7) =991164a(8) =6265304a(9) =31978322a(10) =161993488a(11) =1205560940a(12) =7787001888a(13) =46339128440a(14) =362482299512
External references
- oeis: A260536