Grid[Table[ContourPlot[Sin[k x]*Sin[j y],{x,0,Pi},{y,0,Pi},Frame->False],{j,1,3},{k,1,4}]]

({{, , , }, {, , , }, {, , , }})

Grid[Table[Plot3D[Sin[k x]*Sin[j y],{x,0,Pi},{y,0,Pi},Axes->False,Boxed->False,Mesh->None],{j,1,3},{k,1,4}]]

Table[j^2+k^2,{j,1,20},{k,1,20}]//TableForm