T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with every 2 X 2 subblock nonsingular.

A183710

T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with every 2 X 2 subblock nonsingular.

Terms

    a(0) =192a(1) =2472a(2) =2472a(3) =31800a(4) =108624a(5) =31800a(6) =409128a(7) =4760784a(8) =4760784a(9) =409128a(10) =5263608a(11) =208772880a(12) =710460576a(13) =208772880a(14) =5263608a(15) =67718760a(16) =9154058448a(17) =106093597920a(18) =106093597920a(19) =9154058448a(20) =67718760a(21) =871232952a(22) =401390133264

External references