Get list of checked checkboxes in table column

I'm looking for code which will count and list indexes of checked checkboxes in table column.

For example: in first column I have checked 2 of 3 checkboxes (first and second one), on below column td click I want to get array with checked checkboxes indexes in above column.

Fiddle:

  [1]: http://ift.tt/2xaOacI