Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101.

A260473

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101.

Terms

    a(0) =840a(1) =2562a(2) =13198a(3) =51552a(4) =228287a(5) =1095328a(6) =4771920a(7) =20881559a(8) =95279821a(9) =425856847a(10) =1884583524a(11) =8455381667a(12) =37878158698a(13) =168740477794a(14) =754075134087

External references