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A271406 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 equal. 0
0, 0, 15, 11247, 144602898, 34755893906751, 91608343580208540348, 1934213218888199972768791470, 309708109612351278656208179310639771, 376951205037184664653857886991084818378381176 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 7 of A271407.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=4

.....0........0........0........0........0........0........0........0

....1.1......1.1......1.1......1.0......1.0......1.1......1.2......1.1

...0.1.2....2.2.3....0.1.1....1.1.2....2.1.1....2.1.0....3.3.3....2.2.2

..3.3.2.2..0.2.2.2..2.1.3.2..1.1.0.0..2.1.1.1..3.3.2.3..1.3.2.2..2.1.2.3

CROSSREFS

Cf. A271407.

Sequence in context: A206513 A271404 A271405 * A208299 A282945 A112614

Adjacent sequences:  A271403 A271404 A271405 * A271407 A271408 A271409

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 06 2016

STATUS

approved

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Last modified October 18 19:31 EDT 2021. Contains 348069 sequences. (Running on oeis4.)