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

A185609

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

Terms

    a(0) =0a(1) =580a(2) =580a(3) =2366a(4) =11354a(5) =2366a(6) =22236a(7) =172026a(8) =172026a(9) =22236a(10) =118616a(11) =3017724a(12) =4473352a(13) =3017724a(14) =118616a(15) =891506a(16) =50646550a(17) =173403770a(18) =173403770a(19) =50646550a(20) =891506a(21) =5489048a(22) =873299900a(23) =5539941616a(24) =15211806726a(25) =5539941616a(26) =873299900

External references