

A203380


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


0



1, 4, 13, 125, 1979, 59074, 3266330, 338333666, 65456321768, 23665912780024, 15987549165060685, 20181467277096214505
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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 3's, every 3 is next to 3 0'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..12.


EXAMPLE

Some solutions with all values from 0 to 6 for 7X7X7
........0..............1..............0..............1..............0
.......0.0............3.0............0.0............1.0............0.4
......4.0.3..........0.0.4..........3.0.4..........2.3.0..........4.0.0
.....0.0.5.0........0.6.0.0........0.5.0.0........1.3.0.3........0.0.6.0
....0.6.0.0.0......0.0.0.5.3......0.0.0.3.1......3.0.0.5.0......1.3.0.0.3
...4.0.0.3.3.0....0.3.3.0.0.0....0.6.0.3.2.1....0.0.6.0.0.4....1.2.3.0.5.0
..0.0.3.1.2.1.1..1.1.2.1.3.0.0..0.0.0.0.1.1.0..0.4.0.0.0.0.0..0.1.1.0.0.0.0


CROSSREFS

Sequence in context: A015460 A121813 A197897 * A006104 A067634 A203215
Adjacent sequences: A203377 A203378 A203379 * A203381 A203382 A203383


KEYWORD

nonn


AUTHOR

R. H. Hardin Dec 31 2011


STATUS

approved



