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

A197280

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

Terms

    a(0) =1a(1) =3a(2) =3a(3) =4a(4) =9a(5) =4a(6) =5a(7) =14a(8) =14a(9) =5a(10) =9a(11) =29a(12) =34a(13) =29a(14) =9a(15) =16a(16) =67a(17) =92a(18) =92a(19) =67a(20) =16a(21) =25a(22) =134a(23) =317a(24) =627a(25) =317a(26) =134a(27) =25a(28) =39a(29) =275

External references