Number of (n+1) X 6 0..2 arrays with every 2 X 2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.

A207146

Number of (n+1) X 6 0..2 arrays with every 2 X 2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.

Terms

    a(0) =159a(1) =110a(2) =311a(3) =218a(4) =622a(5) =434a(6) =1238a(7) =866a(8) =2470a(9) =1730a(10) =4934a(11) =3458a(12) =9866a(13) =6914a(14) =19730a(15) =13826a(16) =39458a(17) =27650a(18) =78914a(19) =55298a(20) =157826a(21) =110594a(22) =315650a(23) =221186a(24) =631298a(25) =442370a(26) =1262594a(27) =884738a(28) =2525186a(29) =1769474

External references