T(n,k)=Number of nXk 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors less than or equal to itself.

A196544

T(n,k)=Number of nXk 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors less than or equal to itself.

Terms

    a(0) =1a(1) =3a(2) =3a(3) =2a(4) =23a(5) =2a(6) =7a(7) =56a(8) =56a(9) =7a(10) =19a(11) =461a(12) =555a(13) =461a(14) =19a(15) =35a(16) =2897a(17) =11200a(18) =11200a(19) =2897a(20) =35a(21) =77a(22) =17967a(23) =112723a(24) =340286a(25) =112723a(26) =17967a(27) =77a(28) =176a(29) =116911

External references