Panoramic view of square lattice

[Ralf Stephan]

> This is a bisection of A061571, that is,

Oh well, there is

%S A049687 0,1,1,1,3,1,1,4,4,1,1,5,5,5,1,1,6,7,7,6,1,1,7,8,9,8,7,1,1,8,10,11,11,
%N A049687 Array T read by diagonals: T(i,j)=number of lines passing through (0,0) and at least one other lattice point (h,k) satisfying 0<=h<=i, 0<=k<=j.

This would mean A061571 and A049690 are identical and can be merged.


ralf