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

A259722

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

Terms

    a(0) =1388a(1) =2330a(2) =6092a(3) =12198a(4) =13920a(5) =33846a(6) =75200a(7) =109360a(8) =207144a(9) =488034a(10) =830840a(11) =1412994a(12) =3176940a(13) =6111876a(14) =10240848a(15) =21086966a(16) =43338672a(17) =75819920a(18) =144484316a(19) =300543852a(20) =556594492a(21) =1021061570a(22) =2072946252a(23) =4012227308a(24) =7345052712

External references