Similar to A358715, but now we do not regard dissections which differ by a rotation and/or reflection as distinct.
Table of n, a(n) for n=1..9.
a(3)=3 because of:
/\ /\ /\
/ \ /\/\ /\/\
/ \ / \/\ /\/\/\
Cf. A224239, A358715.
Sequence in context: A232864 A307957 A307956 * A002638 A027072 A083746
Adjacent sequences: A358713 A358714 A358715 * A358717 A358718 A358719
Craig Knecht and John Mason, Nov 28 2022