%N Number of non-equivalent (mod D_4) ways to arrange 5 points on an n X n square grid so that no three points are collinear.
%C Column 5 of A235453.
%C Without the restriction "non-equivalent (mod D_4)" the numbers are given by A194190, n >= 3.
%e There are a(3) = 5 non-equivalent ways to place 5 points (X) on a 3 X 3 grid:
%e X . X X . X . X X X X . X . X
%e X . X X . . X . X X . . X X .
%e . X . . X X . X . . X X . X .
%Y Cf. A235453, A194190, A235454 (3 points), A235455 (4 points), A235457 (6 points), A235458 (7 points)
%A _Heinrich Ludwig_, Jan 12 2014
%E a(13), a(14) from _Heinrich Ludwig_, Nov 16 2016