Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00010101.

A260104

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00010101.

Terms

    a(0) =2575a(1) =6804a(2) =17125a(3) =47498a(4) =127549a(5) =355098a(6) =965197a(7) =2690519a(8) =7384493a(9) =20405960a(10) =56231483a(11) =155187370a(12) =427977626a(13) =1180515446a(14) =3258261087a(15) =8988067228a(16) =24801093969a(17) =68432576155a(18) =188827200959a(19) =520997709228

External references