T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

A234036

T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

Terms

    a(0) =61a(1) =307a(2) =307a(3) =1543a(4) =3059a(5) =1543a(6) =7783a(7) =30263a(8) =30263a(9) =7783a(10) =39331a(11) =300597a(12) =591711a(13) =300597a(14) =39331a(15) =199003a(16) =2990333a(17) =11637549a(18) =11637549a(19) =2990333a(20) =199003a(21) =1007683a(22) =29784763a(23) =229271097a(24) =454996327a(25) =229271097a(26) =29784763a(27) =1007683a(28) =5105107

External references