Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00010001.

A260175

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00010001.

Terms

    a(0) =2221a(1) =6344a(2) =17889a(3) =55849a(4) =189092a(5) =651914a(6) =2136068a(7) =7213362a(8) =24711312a(9) =83529368a(10) =282700608a(11) =962444038a(12) =3267244950a(13) =11083453896a(14) =37685135612a(15) =128025816414a(16) =434507040386

External references