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

A197889

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

Terms

    a(0) =1a(1) =0a(2) =0a(3) =1a(4) =4a(5) =1a(6) =2a(7) =3a(8) =3a(9) =2a(10) =1a(11) =14a(12) =6a(13) =14a(14) =1a(15) =1a(16) =18a(17) =47a(18) =47a(19) =18a(20) =1a(21) =3a(22) =43a(23) =77a(24) =155a(25) =77a(26) =43a(27) =3a(28) =3a(29) =78

External references