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A203111
Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,0,0,0,1,1,1 for x=0,1,2,3,4,5,6.
0
1, 7, 39, 391, 7116, 215645, 11464709, 1047501118, 164954468453, 45226508899186
OFFSET
1,2
COMMENTS
Every 0 is next to 0 5'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 1's, every 5 is next to 5 1's, every 6 is next to 6 1's
EXAMPLE
Some solutions with all values from 0 to 6 for 7X7X7
........0..............0..............1..............0..............0
.......3.0............1.1............0.1............0.3............0.0
......0.3.0..........1.6.1..........2.4.1..........2.2.0..........2.3.0
.....1.1.2.0........0.1.1.0........0.1.1.0........0.1.1.1........0.1.1.1
....1.5.4.1.1......1.1.5.1.2......0.2.5.1.1......1.1.5.4.1......1.1.5.4.1
...0.1.1.1.6.1....1.4.4.1.2.0....0.3.1.1.6.1....1.6.1.1.4.0....1.6.1.1.2.0
..0.2.1.0.1.1.0..1.0.1.1.0.3.0..0.0.2.0.1.1.0..0.1.1.0.1.1.1..0.1.1.0.2.0.0
CROSSREFS
Sequence in context: A365485 A138417 A207154 * A198048 A305361 A202763
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 29 2011
STATUS
approved