A292149 Number of distinct convex heptagons that can be formed from n congruent isosceles right triangles. Reflections are not counted as distinct.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 2, 1, 1, 3, 2, 1, 3, 2, 3, 1, 4, 6, 3, 3, 3, 3, 8, 1, 8, 11, 3, 4, 5, 8, 9, 5, 11, 8, 11, 6, 10, 13, 8, 9, 11, 17, 13, 6, 14, 11, 21, 8, 15, 25, 13, 12, 17, 20, 22, 12, 18, 24, 22, 13, 27, 27

Offset: 1

Author

Douglas J. Durian, Sep 13 2017

Keywords

• nonn

Comments

Illustrated with other convex polyabolos in A245676.

Examples

			The smallest convex heptagonal polyabolos are for n = 15 (symmetrical) and n = 17 (asymmetrical).
		

Links

• Douglas J. Durian, Table of n, a(n) for n = 1..750

Crossrefs

Strictly less than A245676.

Extensions

a(33) and beyond from Douglas J. Durian, Jan 25 2020