[seqfan] Two-fold symmetry sequence

[Frederick Schneider]

Hello,

I tried to find but didn't see the number of distinct 2-fold symmetric
shapes that can be made from n squares.

Starting from n=1 :  1,1,1,3,3,6

Here's an image explaining what I mean:

http://www.bosola.org/grandpa/imgs/2-foldSymmetry.jpg

Has anyone seen a similar sequence?  If not, I'll try to extend this at
least a few terms out.

Thanks,
Fred