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A214389
Number of 7X7X7 triangular 0..n arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and no element equal to its horizontal neighbors
0
128, 5247716, 3183854216, 405643523920, 21313909250888, 623154633711990, 11944886965820440, 166092394781968922, 1792145757381897992
OFFSET
1,1
COMMENTS
Row 7 of A214384
EXAMPLE
Some solutions for n=3
........0..............0..............0..............0..............0
.......0.1............0.1............0.1............0.1............0.1
......1.0.1..........1.0.1..........1.0.1..........1.0.1..........1.0.1
.....1.0.1.0........1.0.1.0........1.0.1.0........1.0.1.0........1.0.1.0
....1.0.1.2.0......1.0.1.0.1......1.0.1.0.2......0.1.0.1.0......1.0.1.3.0
...1.0.2.0.2.0....2.1.0.2.0.1....1.0.2.0.2.3....0.3.0.1.2.0....1.3.0.3.2.0
..1.0.3.0.2.0.2..3.1.0.1.3.0.1..1.0.1.3.0.3.1..2.0.3.0.2.0.3..0.2.3.0.3.0.1
CROSSREFS
Sequence in context: A346008 A017011 A196995 * A017095 A017191 A017299
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 14 2012
STATUS
approved