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A198005 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 0,0,2,1,1,1,2 for x=0,1,2,3,4,5,6 0
1, 4, 4, 44, 562, 4173, 288399, 13101564, 817352426 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

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

........0..............0..............0..............2..............1

.......1.1............2.2............2.2............2.2............0.1

......1.4.3..........2.6.2..........2.6.2..........0.1.1..........1.4.1

.....1.0.1.1........1.2.2.0........0.2.2.1........1.5.1.0........3.1.0.1

....2.2.1.5.0......3.0.1.3.1......3.1.1.0.1......4.1.1.2.2......1.5.1.2.2

...2.6.2.1.1.2....1.1.4.1.5.1....1.1.5.1.4.1....1.1.0.2.6.2....0.1.1.2.6.2

..0.2.2.0.1.2.2..0.1.1.0.1.1.0..1.0.1.3.1.0.1..0.3.1.1.2.2.0..1.3.1.0.2.2.0

CROSSREFS

Sequence in context: A082794 A269913 A197933 * A027501 A341108 A189102

Adjacent sequences: A198002 A198003 A198004 * A198006 A198007 A198008

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 20 2011

STATUS

approved

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Last modified December 6 21:00 EST 2022. Contains 358648 sequences. (Running on oeis4.)