T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,2,0,2 for x=0,1,2,3,4.

A197648

T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,2,0,2 for x=0,1,2,3,4.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =11a(8) =11a(9) =1a(10) =1a(11) =31a(12) =82a(13) =31a(14) =1a(15) =1a(16) =66a(17) =342a(18) =342a(19) =66a(20) =1a(21) =1a(22) =185a(23) =1649a(24) =2910a(25) =1649a(26) =185a(27) =1a(28) =1a(29) =595

External references