Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001.
A260240
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001.
Terms
- a(0) =48a(1) =213a(2) =1476a(3) =5733a(4) =38280a(5) =416911a(6) =1606456a(7) =7479479a(8) =103497076a(9) =746247122a(10) =2383760912a(11) =25616797423a(12) =351265905756
External references
- oeis: A260240