Number of (n+1) X 8 0..2 arrays with every 2 X 2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.

A207148

Number of (n+1) X 8 0..2 arrays with every 2 X 2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.

Terms

    a(0) =315a(1) =218a(2) =619a(3) =434a(4) =1238a(5) =866a(6) =2482a(7) =1730a(8) =4946a(9) =3458a(10) =9874a(11) =6914a(12) =19730a(13) =13826a(14) =39458a(15) =27650a(16) =78914a(17) =55298a(18) =157826a(19) =110594a(20) =315650a(21) =221186a(22) =631298a(23) =442370a(24) =1262594a(25) =884738a(26) =2525186a(27) =1769474a(28) =5050370a(29) =3538946

External references