Basic picture.
For all c.
c = ab = dd+e = (d+n)(d+n)-(x+n)(x+n) = aa + 2ax + 2an
Grid (p,q) where p and q are signed integers
Elements in a cell are products with notation: e:n:d:x:a:b
The first two of the notation correspond to the coordinates in the grid.
Horizontal black line (e,1), (-f,1)
Vertical black line (0,n)
Vertical grey line (-1,n)
For some SPECIFIC c = ab = dd+e = (d+n)(d+n)-(x+n)(x+n) = aa + 2ax + 2an
Dark green line : column that contains e
Dark maroon line : column that contains -f
Pinkish-purple square cell in dark green line at (e,1) contains an and bn at elements t and t+n which are elements:
e:1:(na+x):x:na:(na+2x+2)
and
e:1:(nb+2x+2n):(x+2n):(nb+x+2n):(nb+3x+6n+2)
Blue square in dark maroon line (-f,1) that contains a(n-1) and b(n-1) at t and t+n-1 elements
Orange squares in -f line and e line : squares that contain c as a product… -f:n-1:d:x:a:b and e:n:d:x:a:b respectively. THESE SQUARES ARE ONE LINE APART.
Pick any odd c and this holds for all. ALL.