Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000101.

A260000

Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000101.

Terms

    a(0) =7284a(1) =32525a(2) =112570a(3) =197804a(4) =450718a(5) =1890678a(6) =4405472a(7) =8894577a(8) =30259110a(9) =85219828a(10) =189364182a(11) =533978795a(12) =1526717742a(13) =3840271170a(14) =10224583070a(15) =27687815294a(16) =72927251426a(17) =197908151664a(18) =519999108640

External references