The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A153901 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A153901

Number of planar n X n X n binary triangular grids symmetric both under 120-degree rotation and reflection with no more than 1 one in any 3 X 3 X 3 subtriangle.
(history; published version)

#8 by Michael De Vlieger at Sat Feb 25 18:06:51 EST 2023

STATUS

proposed

approved

#7 by Jon E. Schoenfield at Sat Feb 25 18:03:42 EST 2023

STATUS

editing

proposed

#6 by Jon E. Schoenfield at Sat Feb 25 18:03:40 EST 2023

NAME

Number of planar n X n X n binary triangular grids symmetric both under 120 -degree rotation and reflection with no more than 1 one in any 3 X 3 X 3 subtriangle.

STATUS

approved

editing

#5 by Jon E. Schoenfield at Wed Apr 28 00:13:31 EDT 2021

STATUS

editing

approved

#4 by Jon E. Schoenfield at Wed Apr 28 00:13:30 EDT 2021

AUTHOR

R. H. Hardin , Jan 03 2009

STATUS

approved

editing

#3 by Russ Cox at Sat Mar 31 12:35:21 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Jan 03 2009

Discussion

Sat Mar 31

12:35

OEIS Server: https://oeis.org/edit/global/875

#2 by N. J. A. Sloane at Sat Oct 02 03:00:00 EDT 2010

KEYWORD

nonn,new

nonn

AUTHOR

Ron R. H. Hardin (rhhardin(AT)att.net) Jan 03 2009

#1 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

NAME

Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 1 one in any 3 X 3 X 3 subtriangle.

DATA

1, 2, 1, 1, 3, 2, 2, 7, 3, 6, 15, 12, 17, 63, 47, 86, 272, 269, 423, 2020, 1609, 3902, 14951, 18193, 36083, 200112, 201396, 575152, 2652677, 3907855, 9200561

OFFSET

0,2

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 03 2009

STATUS

approved