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A183280 Half the number of nXnXn triangular binary arrays with no element having four consecutive neighbors taken clockwise with equal values 0
1, 4, 22, 134, 868, 6052, 46848, 415306, 4322824, 53913412, 818822848, 15278575800, 351372976224, 9962126955988, 348066786734314, 14985977146717232, 795230927064186056, 52013690674597756472, 4193062390412799383812 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
Some solutions for 6X6X6 with a(1,1)=0
.......0............0............0............0............0............0
......1.0..........0.0..........1.1..........1.0..........1.1..........0.1
.....0.1.1........1.1.1........1.0.0........1.0.1........0.0.1........0.1.1
....1.0.0.1......0.0.0.1......0.0.0.1......1.0.1.0......1.0.0.0......1.0.1.0
...0.1.0.0.0....1.1.0.0.1....0.0.1.1.1....0.1.0.1.0....1.1.1.1.1....1.1.0.1.0
..0.0.1.1.1.0..0.0.1.1.0.1..0.1.1.1.0.0..0.1.1.0.1.0..0.1.0.0.0.1..0.1.0.1.1.0
CROSSREFS
Sequence in context: A321275 A274745 A197657 * A183281 A067120 A143648
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2011
STATUS
approved

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Last modified March 28 12:26 EDT 2024. Contains 371254 sequences. (Running on oeis4.)