The On-Line Encyclopedia of Integer Sequences (OEIS)

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Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,1 5,1 6,0 6,1 polyhexes in any orientation on a planar n X n X n triangular grid.
(history; published version)

#5 by Wesley Ivan Hurt at Mon Apr 26 19:42:45 EDT 2021

STATUS

editing

approved

#4 by Wesley Ivan Hurt at Mon Apr 26 19:42:34 EDT 2021

NAME

Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,1 5,1 6,0 6,1 polyhexes in any orientation on a planar nXnXn n X n X n triangular grid.

STATUS

approved

editing

#3 by Russ Cox at Sat Mar 31 12:35:23 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Jan 22 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 22 2009

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

NAME

Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,1 5,1 6,0 6,1 polyhexes in any orientation on a planar nXnXn triangular grid.

DATA

1, 7, 19, 43, 239, 1041, 3863, 18481, 111137, 720077, 5291974, 48305684

OFFSET

6,2

EXAMPLE

Maximal 10 X 10 X 10 example

............0

...........1.1

..........0.0.1

.........0.0.0.1

........1.1.0.1.0

.......1.0.0.0.1.0

......1.0.0.0.0.1.1

.....0.1.0.0.0.0.0.0

....0.1.0.1.1.1.0.0.1

...1.1.0.1.0.0.1.1.1.0

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 22 2009

STATUS

approved