Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..1 introduced in row major order.

A204746

Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..1 introduced in row major order.

Terms

    a(0) =40a(1) =46a(2) =22a(3) =32a(4) =48a(5) =74a(6) =116a(7) =184a(8) =294a(9) =472a(10) =760a(11) =1226a(12) =1980a(13) =3200a(14) =5174a(15) =8368a(16) =13536a(17) =21898a(18) =35428a(19) =57320a(20) =92742a(21) =150056a(22) =242792a(23) =392842

External references