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

A185807

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

Terms

    a(0) =0a(1) =704a(2) =704a(3) =2176a(4) =13440a(5) =2176a(6) =30976a(7) =260544a(8) =260544a(9) =30976a(10) =166272a(11) =5177344a(12) =11019840a(13) =5177344a(14) =166272a(15) =1567936a(16) =104024384a(17) =593036512a(18) =593036512a(19) =104024384a(20) =1567936a(21) =10419200a(22) =2091689856a(23) =29410603520a(24) =77815012608a(25) =29410603520

External references