A197789 - OEIS

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A197789

Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,0,1,1,0,1,0 for x=0,1,2,3,4,5,6

1, 4, 7, 26, 287, 2300, 33118, 645914, 18803386, 827398260

(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 0's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 0's, every 5 is next to 5 1'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 8X8X8

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

........1.1..............1.1..............1.1..............1.0

.......1.5.1............3.0.3............1.5.1............1.3.0

......0.1.3.0..........1.1.1.1..........0.3.1.0..........0.1.3.0

.....3.1.1.4.0........0.3.1.5.0........0.4.1.1.1........0.4.1.1.1

....1.1.1.0.0.0......0.0.0.1.1.1......0.0.0.1.5.1......0.0.0.1.5.1

...1.0.1.3.0.6.0....0.6.0.4.3.5.1....0.6.0.3.1.0.1....0.6.0.3.1.0.1

..2.1.3.1.0.0.0.0..0.0.0.0.0.1.1.0..0.0.0.0.1.1.1.2..0.0.0.0.1.3.1.2

CROSSREFS

Sequence in context: A077441 A269744 A303844 * A076148 A203570 A146085

Adjacent sequences: A197786 A197787 A197788 * A197790 A197791 A197792

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 18 2011

STATUS

approved