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

A196950

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

Terms

    a(0) =1a(1) =2a(2) =2a(3) =4a(4) =11a(5) =4a(6) =6a(7) =38a(8) =38a(9) =6a(10) =12a(11) =136a(12) =210a(13) =136a(14) =12a(15) =22a(16) =496a(17) =1416a(18) =1416a(19) =496a(20) =22a(21) =40a(22) =1792a(23) =9199a(24) =18060a(25) =9199a(26) =1792a(27) =40a(28) =74a(29) =6440

External references