Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010001 or 00010101.
A260608
Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010001 or 00010101.
Terms
- a(0) =2246a(1) =5418a(2) =19069a(3) =59758a(4) =217376a(5) =727342a(6) =2707758a(7) =8855024a(8) =33286034a(9) =110210856a(10) =412748296a(11) =1357891144a(12) =5097313270a(13) =16821243128a(14) =63055195644a(15) =207867167400a(16) =779656269748
External references
- oeis: A260608