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A183291
Number of nXnXnXn triangular pyramidal binary arrays with the number of 0-0 adjacencies equal to the number of 0-1 adjacencies
0
2, 5, 75, 29721, 331189203
OFFSET
1,1
EXAMPLE
Some solutions for 3X3X3X3
....0......1......0......0......0......1......0......0......1......0......1
...
....0......1......0......0......1......0......0......1......0......0......0
...0.1....0.0....0.0....0.1....0.0....0.0....0.0....0.0....0.1....0.0....0.0
...
....1......0......1......0......0......1......1......0......0......1......0
...0.1....0.1....1.0....0.0....0.0....0.0....0.0....0.0....0.0....1.1....1.0
..0.0.0..0.0.0..1.0.1..1.1.0..0.1.0..1.0.1..1.1.1..1.0.1..0.1.0..0.0.1..0.0.1
CROSSREFS
Sequence in context: A172037 A301993 A128297 * A372482 A254405 A216847
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2011
STATUS
approved