login
A292149
Number of distinct convex heptagons that can be formed from n congruent isosceles right triangles. Reflections are not counted as distinct.
2
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
1,23
COMMENTS
Illustrated with other convex polyabolos in A245676.
LINKS
EXAMPLE
The smallest convex heptagonal polyabolos are for n = 15 (symmetrical) and n = 17 (asymmetrical).
CROSSREFS
Strictly less than A245676.
Sequence in context: A280073 A327523 A190770 * A275676 A025831 A184751
KEYWORD
nonn
AUTHOR
Douglas J. Durian, Sep 13 2017
EXTENSIONS
a(33) and beyond from Douglas J. Durian, Jan 25 2020
STATUS
approved