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A271069
Number of nXnXn triangular 0..1 arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all equal.
2
0, 1, 13, 138, 1628, 23527, 435147, 10546164, 339692832, 14675385285, 855707505235, 67645098281722, 7273718690098068, 1066532362363098251, 213665221064800026604, 58573977551568152227368
OFFSET
1,3
COMMENTS
Column 1 of A271075.
LINKS
EXAMPLE
Some solutions for n=4
.....0........0........0........0........0........0........0........0
....0.1......0.0......1.0......0.1......1.0......1.0......1.0......1.1
...1.1.1....0.1.1....1.0.0....1.1.1....1.0.0....1.0.1....0.0.0....0.1.0
..1.0.0.1..0.1.0.0..0.1.1.0..1.0.0.0..0.0.1.1..0.0.0.1..1.1.1.1..1.0.1.0
CROSSREFS
Cf. A271075.
Sequence in context: A164967 A090505 A088096 * A023301 A023329 A280745
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 29 2016
STATUS
approved