A271071 Number of nXnXn triangular 0..3 arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all equal.

0, 1, 35, 11652, 14051884, 55113279071, 726372812550936, 32867765419855385574, 5174271092345126778373239, 2858869610791981590042996028002, 5577501653442884795100072300726933995

Offset

1,3

Comments

Column 3 of A271075.

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=4
.....0........0........0........0........0........0........0........0
....0.1......0.1......1.2......1.2......0.1......1.0......1.1......1.2
...2.2.1....1.2.1....0.3.3....1.1.1....0.0.2....2.1.1....0.1.0....2.2.2
..1.3.1.1..3.2.2.2..0.0.1.3..2.0.2.3..2.3.0.2..1.3.1.2..0.1.2.2..1.0.1.1

Crossrefs

Cf. A271075.

Sequence in context: A212025 A316940 A202066 * A249889 A030261 A345675

Adjacent sequences: A271068 A271069 A271070 * A271072 A271073 A271074

Keyword

nonn

Author

R. H. Hardin, Mar 29 2016

Status

approved