Number of (n+1)X6 0..2 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

A186468

Number of (n+1)X6 0..2 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

Terms

    a(0) =966a(1) =903a(2) =3190a(3) =4875a(4) =13278a(5) =16083a(6) =40626a(7) =52755a(8) =129102a(9) =182841a(10) =418022a(11) =632281a(12) =1362100a(13) =2157562a(14) =4454506a(15) =7311254a(16) =14630604a(17) =24660486a(18) =48209460a(19) =82892994a(20) =159253412a(21) =277942714a(22) =527083732a(23) =930249586a(24) =1747039708a(25) =3109258106

External references