Again, same as with other functions. My recommendation is reading docs - there are many good examples there.
Clear[f, g];
f[1] = Pi;
f[n_] := f[n] = n f[n - 1];
g[1] = 2;
g[n_] := g[n] = n^3 + g[n - 1]
ListLinePlot[{
Table[f[n], {n, 1, 5}],
Table[g[n], {n, 1, 5}]
}, PlotTheme -> "Business"]