The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A292149 Number of distinct convex heptagons that can be formed from n congruent isosceles right triangles. Reflections are not counted as distinct. 2

%I

%S 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,

%T 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,

%U 8,15,25,13,12,17,20,22,12,18,24,22,13,27,27

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

%C Illustrated with other convex polyabolos in A245676.

%H Douglas J. Durian, <a href="/A292149/b292149.txt">Table of n, a(n) for n = 1..750</a>

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

%Y Strictly less than A245676.

%K nonn

%O 1,23

%A _Douglas J. Durian_, Sep 13 2017

%E a(33) and beyond from _Douglas J. Durian_, Jan 25 2020

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 21 12:54 EDT 2021. Contains 347598 sequences. (Running on oeis4.)