

A203201


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


0



1, 7, 45, 678, 19821, 1135546, 128706621, 28772553591, 12688158470905, 11038796622724926, 18946762224571940462
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OFFSET

1,2


COMMENTS

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


LINKS

Table of n, a(n) for n=1..11.


EXAMPLE

Some solutions with all values from 0 to 6 for 7X7X7
........0..............1..............0..............0..............2
.......0.0............2.0............0.0............1.1............0.0
......0.5.0..........0.4.0..........0.5.0..........1.6.1..........0.5.0
.....0.0.3.0........4.0.3.0........0.3.0.3........0.1.1.0........4.0.3.0
....3.0.2.1.1......0.0.2.1.1......1.1.2.0.3......0.3.2.3.0......0.0.2.1.1
...2.0.4.1.6.1....0.5.3.1.6.1....1.6.1.4.0.0....2.4.0.0.5.0....0.0.4.1.6.1
..0.3.0.0.1.1.0..0.0.0.0.1.1.0..0.1.1.0.0.4.0..1.0.0.4.0.0.2..0.0.0.0.1.1.0


CROSSREFS

Sequence in context: A197856 A205080 A232789 * A287064 A222901 A175909
Adjacent sequences: A203198 A203199 A203200 * A203202 A203203 A203204


KEYWORD

nonn


AUTHOR

R. H. Hardin Dec 30 2011


STATUS

approved



