Equation Equivalent

I am using series to create masks for grouping two neighbouring objects together from a grid of panels, using contains points (center points)- Then re-introduce them back into the grid I took them from in the first place.

What would I use to create these sets in a simple object which I can plug everything into. i.e. a mathematical script which uses one number (the number of items in the column). to join every neighbouring pair together. in this case, 21 rows, in 12 columns. Collecting the sets - 1 to 21 with 22 to 43 then 44 to 65 with 66 to 87 etc etc etc.

The selecting curves for the columns are drawn in Rhino, and are all equal in number (in height) as shown in Top view.