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A292147 Number of distinct convex pentagons that can be formed from n congruent isosceles right triangles. Reflections are not counted as distinct. 2
0, 0, 0, 0, 1, 1, 2, 0, 1, 2, 4, 1, 3, 5, 5, 2, 3, 2, 6, 5, 2, 8, 11, 1, 3, 7, 6, 7, 6, 7, 13, 7, 4, 8, 8, 5, 5, 13, 14, 8, 8, 4, 8, 14, 5, 17, 22, 5, 5, 7, 8, 14, 8, 14, 18, 13, 4, 11, 18, 7, 10, 22, 18, 15, 7, 9, 10, 19, 9, 16, 29, 8, 9, 12, 10, 23, 9, 19 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

COMMENTS

Illustrated with other convex polyabolos in A245676.

LINKS

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

EXAMPLE

The smallest convex pentagonal polyabolo is for n=5.

CROSSREFS

Strictly less than A245676.

Sequence in context: A227318 A166692 A046766 * A003285 A059347 A071496

Adjacent sequences:  A292144 A292145 A292146 * A292148 A292149 A292150

KEYWORD

nonn

AUTHOR

Douglas J. Durian, Sep 10 2017

EXTENSIONS

a(33) and beyond from Douglas J. Durian, Jan 24 2020

STATUS

approved

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Last modified September 20 11:42 EDT 2021. Contains 347584 sequences. (Running on oeis4.)