T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants.

A186786

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants.

Terms

    a(0) =0a(1) =580a(2) =580a(3) =2366a(4) =11354a(5) =2366a(6) =22236a(7) =63504a(8) =63504a(9) =22236a(10) =118616a(11) =739334a(12) =696596a(13) =739334a(14) =118616a(15) =891506a(16) =8499038a(17) =17120960a(18) =17120960a(19) =8499038a(20) =891506a(21) =5489048a(22) =97501656a(23) =281080458a(24) =658080772a(25) =281080458a(26) =97501656a(27) =5489048a(28) =38326452

External references