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A197992 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,3,2,1,0,0,0 for x=0,1,2,3,4,5,6 0
1, 2, 16, 78, 1557, 58327, 3432134, 482064953, 129436138615, 67796772002632 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Every 0 is next to 0 2's, every 1 is next to 1 3's, every 2 is next to 2 2's, every 3 is next to 3 1's, every 4 is next to 4 0's, every 5 is next to 5 0's, every 6 is next to 6 0's

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions with all values from 0 to 6 for 7X7X7

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

.......0.0............0.0............0.0............0.4............0.0

......0.0.0..........0.6.0..........4.0.0..........4.0.0..........0.0.0

.....0.0.6.0........4.0.0.0........0.0.6.0........0.0.6.0........0.5.4.0

....0.0.0.0.1......0.0.5.1.1......0.5.0.0.1......4.0.0.0.1......0.0.0.1.1

...4.0.5.1.3.2....0.6.0.0.3.2....1.1.0.1.3.2....0.0.5.1.3.2....0.0.6.0.3.2

..0.0.0.0.1.2.2..0.0.0.0.1.2.2..0.3.1.0.1.2.2..0.4.0.0.1.2.2..0.0.0.0.1.2.2

CROSSREFS

Sequence in context: A207723 A208835 A208683 * A265173 A264573 A225959

Adjacent sequences:  A197989 A197990 A197991 * A197993 A197994 A197995

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 20 2011

STATUS

approved

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Last modified July 24 18:34 EDT 2021. Contains 346273 sequences. (Running on oeis4.)