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Revision History for A333275 (Underlined text is an addition; strikethrough text is a deletion.)

Showing entries 1-10 | older changes
A333275 Irregular triangle read by rows: consider the graph defined in A306302 formed from a row of n adjacent congruent rectangles by drawing the diagonals of all visible rectangles; T(n,k) (n >= 1, 2 <= k <= 2n+2) is the number of non-boundary vertices in the graph at which k polygons meet.
(history; published version)
#32 by Michael De Vlieger at Mon Jan 01 22:47:07 EST 2024
STATUS

proposed

approved

#31 by Andrew Howroyd at Mon Jan 01 21:21:40 EST 2024
STATUS

editing

proposed

#30 by Andrew Howroyd at Mon Jan 01 21:18:44 EST 2024
KEYWORD

nonn,tabf,more

STATUS

approved

editing

#29 by N. J. A. Sloane at Fri May 21 07:15:01 EDT 2021
STATUS

editing

approved

#28 by N. J. A. Sloane at Fri May 21 07:14:59 EDT 2021
LINKS

Lars Blomberg, Scott R. Shannon, N. J. A. Sloane, <a href="http://neilsloane.com/doc/rose_5.pdf">Graphical Enumeration and Stained Glass Windows, 1: Rectangular Grids</a>, (2021). Also arXiv:2009.07918.

STATUS

approved

editing

#27 by N. J. A. Sloane at Mon Jul 27 20:43:02 EDT 2020
STATUS

editing

approved

#26 by N. J. A. Sloane at Mon Jul 27 20:43:00 EDT 2020
EXAMPLE

If we leave out the uninteresting zeros, the triangle begins:

[1]

[6, 1]

[24, 2, 1]

[54, 8, 2, 1]

[124, 18, 2, 2, 1]

[214, 32, 10, 2, 2, 1]

[382, 50, 22, 2, 2, 2, 1]

[598, 102, 18, 12, 2, 2, 2, 1]

[950, 126, 32, 26, 2, 2, 2, 2, 1]

[1334, 198, 62, 20, 14, 2, 2, 2, 2, 1]

[1912, 286, 100, 10, 30, 2, 2, 2, 2, 2, 1]

[2622, 390, 118, 38, 22, 16, 2, 2, 2, 2, 2, 1]

... - N. J. A. Sloane, Jul 27 2020

STATUS

approved

editing

#25 by N. J. A. Sloane at Wed Jun 17 13:08:28 EDT 2020
STATUS

reviewed

approved

#24 by Joerg Arndt at Wed Jun 17 09:51:31 EDT 2020
STATUS

proposed

reviewed

#23 by Lars Blomberg at Wed Jun 17 07:46:16 EDT 2020
STATUS

editing

proposed

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Last modified August 30 03:24 EDT 2024. Contains 375523 sequences. (Running on oeis4.)