The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A092866 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A092866

Number of intersections inside an equilateral triangular figure formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. If three or more lines meet at an interior point this intersection is counted only once.
(history; published version)

#98 by R. J. Mathar at Mon Nov 13 11:28:36 EST 2023

STATUS

editing

approved

#97 by R. J. Mathar at Mon Nov 13 11:28:33 EST 2023

CROSSREFS

If the boundary points are in general position, we get A367117, A366481, A213827, A367118, A367119. - N. J. A. Sloane, Nov 09 2023

STATUS

approved

editing

#96 by N. J. A. Sloane at Thu Nov 09 03:24:05 EST 2023

STATUS

editing

approved

#95 by N. J. A. Sloane at Thu Nov 09 03:24:02 EST 2023

CROSSREFS

If the boundary points are in general position, we get A367117, A366481, A367118, A367119. - N. J. A. Sloane, Nov 09 2023

STATUS

approved

editing

#94 by N. J. A. Sloane at Mon Nov 06 21:19:11 EST 2023

STATUS

editing

approved

#93 by N. J. A. Sloane at Mon Nov 06 21:19:08 EST 2023

LINKS

Index to OEIS, <a href="/index/Pol#Poonen">Sequences formed by drawing all diagonals in regular polygon</a>

STATUS

approved

editing

#92 by N. J. A. Sloane at Wed May 13 22:59:31 EDT 2020

STATUS

editing

approved

#91 by N. J. A. Sloane at Wed May 13 22:59:26 EDT 2020

NAME

Number of intersections inside a an equilateral triangular figure formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. If three or more lines meet at an interior point this intersection is counted only once.

EXTENSIONS

"Equilateral" added to definition by N. J. A. Sloane, May 13 2020

STATUS

approved

editing

#90 by Max Alekseyev at Tue Apr 23 20:22:01 EDT 2019

STATUS

editing

approved

#89 by Max Alekseyev at Tue Apr 23 20:21:57 EDT 2019

EXTENSIONS

a(21)-a(50) from Cynthia Miaina Rasamimanananivo, Jun 30 2016, Jul 01 - Aug 23, 2016,

Aug 05 2016, Aug 15 2016, Aug 23 2016

STATUS

approved

editing