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A292149 Number of distinct convex heptagons that can be formed from n congruent isosceles right triangles. Reflections are not counted as distinct. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,23

COMMENTS

Illustrated with other convex polyabolos in A245676.

LINKS

Table of n, a(n) for n=1..32.

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

Adjacent sequences:  A292146 A292147 A292148 * A292150 A292151 A292152

KEYWORD

nonn,more

AUTHOR

Douglas J. Durian, Sep 13 2017

STATUS

approved

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Last modified January 25 23:08 EST 2020. Contains 331270 sequences. (Running on oeis4.)