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A271245 Number of nXnXn triangular 0..7 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all different. 0
0, 0, 77, 39237, 49235880, 209021374705, 3081891326050173, 151686712380427499712 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Column 7 of A271246.
LINKS
EXAMPLE
Some solutions for n=4
.....0........0........0........0........0........0........0........0
....1.1......0.0......1.2......1.2......0.0......1.2......1.2......1.2
...2.0.3....1.0.1....1.1.3....1.3.1....1.2.3....3.2.0....3.1.0....3.4.4
..0.4.0.4..2.0.2.3..4.2.2.4..4.1.3.5..3.2.4.4..2.2.4.3..4.2.0.1..1.4.2.0
CROSSREFS
Cf. A271246.
Sequence in context: A267910 A271243 A271244 * A196543 A201983 A278370
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 02 2016
STATUS
approved

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Last modified March 28 14:13 EDT 2024. Contains 371254 sequences. (Running on oeis4.)