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A197925
Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,2,1,1,1,0,0 for x=0,1,2,3,4,5,6
0
1, 4, 22, 156, 4277, 103671, 7433963, 912939580, 204689985054
OFFSET
1,2
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 2's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1's, every 5 is next to 5 0's, every 6 is next to 6 0's
EXAMPLE
Some solutions with all values from 0 to 6 for 7X7X7
........0..............2..............0..............0..............2
.......0.0............1.1............2.1............0.0............1.1
......0.6.0..........1.4.1..........1.4.1..........0.1.2..........3.4.1
.....0.0.0.0........1.2.2.3........3.1.2.0........0.5.0.1........1.1.2.0
....0.5.0.2.1......0.0.0.1.1......2.1.0.0.0......0.0.0.1.3......2.0.0.5.0
...1.0.1.1.4.1....0.6.0.5.0.2....1.0.5.0.6.0....0.6.0.2.4.1....1.0.6.0.0.1
..1.2.2.1.3.1.2..0.0.0.0.0.0.1..0.0.0.0.0.0.0..0.0.0.0.1.1.2..0.0.0.0.1.2.0
CROSSREFS
Sequence in context: A371496 A052650 A198053 * A112697 A327994 A113717
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 19 2011
STATUS
approved