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A271401 Number of nXnXn triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one inverted 2x2x2 triangle having values all equal. 1
0, 0, 14, 2592, 896832, 685305792, 1246974564672, 5607184696618752, 63628800211599189696, 1845949854751814927534400, 138092017951559818658767383936, 26797163221892636458271315168303232 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A271407.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..13

EXAMPLE

Some solutions for n=4

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

....1.1......0.1......0.0......1.1......1.2......1.1......1.1......1.0

...2.2.2....2.0.0....1.1.2....0.0.0....2.2.0....0.1.0....0.1.2....0.0.2

..1.1.2.1..1.1.0.0..1.1.0.1..0.0.2.1..0.2.2.1..0.0.1.2..0.1.0.1..1.0.1.1

CROSSREFS

Cf. A271407.

Sequence in context: A268424 A079918 A199648 * A013719 A145188 A279526

Adjacent sequences:  A271398 A271399 A271400 * A271402 A271403 A271404

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 06 2016

STATUS

approved

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Last modified September 20 10:51 EDT 2021. Contains 347584 sequences. (Running on oeis4.)