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A203381
Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,0,0,1,1,1,1 for x=0,1,2,3,4,5,6
0
1, 7, 18, 82, 1090, 12586, 291279, 12259792, 672729110, 65870824221
OFFSET
1,2
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 0's, every 2 is next to 2 0's, every 3 is next to 3 1'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..............0..............0..............0
.......1.1............1.2............1.1............1.1............1.1
......1.4.1..........1.4.0..........3.5.1..........1.6.1..........1.6.1
.....1.0.2.0........0.1.1.1........1.1.1.0........0.1.1.0........0.1.1.0
....3.1.1.1.1......1.1.5.4.3......1.0.4.1.1......2.1.5.1.1......1.1.1.2.1
...1.5.1.1.6.1....1.6.1.1.1.1....1.2.2.1.6.1....0.1.4.1.2.2....1.5.1.0.4.1
..0.1.1.0.1.1.0..0.1.1.0.2.0.1..1.0.2.0.1.1.0..1.1.3.1.0.0.0..0.1.3.1.1.1.0
CROSSREFS
Sequence in context: A024830 A262489 A030982 * A207158 A304992 A375356
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 31 2011
STATUS
approved