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 2,2,1,1,1 for x=0,1,2,3,4.

A197545

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 2,2,1,1,1 for x=0,1,2,3,4.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =2a(6) =3a(7) =8a(8) =8a(9) =3a(10) =4a(11) =19a(12) =11a(13) =19a(14) =4a(15) =6a(16) =28a(17) =24a(18) =24a(19) =28a(20) =6a(21) =9a(22) =58a(23) =61a(24) =131a(25) =61a(26) =58a(27) =9a(28) =13a(29) =119

External references