Numbers of walks, w(n,x), on the positive x-axis.
Layers of a Pascal semi-pyramid: values of 
.
Sums of rows of Fig. 2: values of 
.
Layers of a Pascal quarter-pyramid: values of 
.
Sums of rows of Fig. 4: values of 
.
Sums of diagonals of Fig.4: values of 
.
Walks in three dimensions: values of 
.