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A271188 Number of nXnXn triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all different. 1
0, 1, 48, 3654, 546604, 173123868, 120268341210, 186894023900240, 657585270869505423, 5280815619326228961327, 97334193255656777198310662, 4134298293573473978291399679465, 405905093869786965065628534801801735 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A271194.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..14

EXAMPLE

Some solutions for n=4

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

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

...0.0.1....2.2.1....1.2.0....2.1.2....1.1.1....0.1.1....1.1.2....2.2.2

..1.1.2.1..2.0.0.1..2.2.1.1..2.1.2.0..2.1.1.1..0.1.1.2..0.1.0.1..2.1.0.2

CROSSREFS

Cf. A271194.

Sequence in context: A203488 A162700 A027567 * A033475 A053060 A004034

Adjacent sequences:  A271185 A271186 A271187 * A271189 A271190 A271191

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 01 2016

STATUS

approved

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Last modified September 20 18:35 EDT 2019. Contains 327245 sequences. (Running on oeis4.)