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A271400
Number of nXnXn triangular 0..1 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all equal.
2
0, 0, 8, 216, 6048, 203256, 8627472, 475098048, 34505348760, 3341298530016, 434656549010376, 76372500634028280, 18198479103071529600, 5898858710813046614376, 2607147775322232410982384
OFFSET
1,3
COMMENTS
Column 1 of A271407.
LINKS
EXAMPLE
Some solutions for n=4
.....0........0........0........0........0........0........0........0
....0.1......1.1......0.1......1.1......0.0......1.0......1.1......1.0
...0.0.1....0.1.0....0.1.1....0.0.0....0.1.1....1.0.0....0.1.1....1.1.1
..0.0.1.0..0.1.0.1..0.0.1.1..0.1.0.1..0.1.1.0..1.1.0.0..0.0.0.1..1.0.1.0
CROSSREFS
Cf. A271407.
Sequence in context: A069045 A288323 A264056 * A123057 A353933 A362073
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 06 2016
STATUS
approved