A292150 Number of distinct convex octagons 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, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 3, 0, 1, 1, 1, 1, 1, 1, 5, 0, 3, 1, 1, 1, 3, 3, 5, 1, 1, 2, 8, 1, 3, 2, 7, 3, 3, 5, 4, 2, 8, 3, 12, 2, 4, 7, 7, 3, 6, 6, 15, 3, 5, 8, 12, 7, 9, 5, 15, 4, 12, 11, 11, 7, 6

Offset

1,30

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 octagonal polyabolos are for n = 14 and n = 20; both are symmetrical.

Crossrefs

Strictly less than A245676.

Sequence in context: A065714 A110700 A338939 * A181875 A051908 A056614

Adjacent sequences: A292147 A292148 A292149 * A292151 A292152 A292153

Keyword

nonn

Author

Douglas J. Durian, Sep 13 2017

Extensions

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

Status

approved