Number of (n+1) X 5 0..3 arrays with every 2 X 2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.

A206339

Number of (n+1) X 5 0..3 arrays with every 2 X 2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.

Terms

    a(0) =296a(1) =534a(2) =682a(3) =1581a(4) =2034a(5) =4711a(6) =6078a(7) =14101a(8) =18210a(9) =42271a(10) =54606a(11) =126799a(12) =163806a(13) =380385a(14) =491406a(15) =1141143a(16) =1474206a(17) =3423417a(18) =4422606a(19) =10270239a(20) =13267806a(21) =30810705a(22) =39803406a(23) =92432103a(24) =119410206a(25) =277296297a(26) =358230606a(27) =831888879

External references