The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A153994

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Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 11 ones in any 5 X 5 X 5 subtriangle.
(history; published version)

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

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Jan 04 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 04 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 under 120 degree rotation with no more than 11 ones in any 5 X 5 X 5 subtriangle.

DATA

1, 2, 2, 4, 16, 26, 114, 913, 3227, 25373, 441919, 3146641, 49361868, 1683721022, 23850420259, 734273471828, 49324500595954, 1380740815171041

OFFSET

0,2

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 04 2009

STATUS

approved