

A197681


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


0



1, 4, 9, 12, 24, 45, 57, 71, 171, 162, 294, 526, 634, 774, 1965, 1306, 2739, 4924
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OFFSET

1,2


COMMENTS

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


LINKS

Table of n, a(n) for n=1..18.


EXAMPLE

Some solutions for 5X5X5
......0..........2..........0..........0..........0..........0..........0
.....0.0........0.0........2.2........2.0........0.0........2.2........0.0
....2.0.2......2.2.2......2.0.2......2.2.2......0.0.0......0.2.0......0.0.0
...2.2.2.2....0.2.2.0....2.0.0.2....0.0.2.0....0.0.0.0....2.2.2.2....0.0.0.0
..0.0.2.0.0..0.0.2.0.2..0.2.2.2.0..2.0.2.2.0..0.0.0.0.2..0.2.0.2.0..2.0.0.0.0


CROSSREFS

Sequence in context: A124623 A220195 A221355 * A197624 A199973 A320925
Adjacent sequences: A197678 A197679 A197680 * A197682 A197683 A197684


KEYWORD

nonn


AUTHOR

R. H. Hardin Oct 17 2011


STATUS

approved



