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A193156 Number of nXnXn triangular 0..2 arrays with each element equal to the sum mod 3 of two neighbors 0
0, 1, 21, 1093, 172217, 81613877, 113899763795, 468482952092893, 5676720267644621509 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for 4X4X4

.....1........0........0........1........1........0........2........0

....2.2......2.1......1.2......1.0......2.2......1.2......1.1......2.1

...2.1.2....1.0.2....1.2.1....0.2.0....1.1.2....0.1.1....2.1.0....2.0.1

..2.0.1.0..2.1.1.0..1.0.1.2..0.0.1.1..2.1.2.1..2.2.0.1..0.1.0.0..0.1.1.2

CROSSREFS

Sequence in context: A231521 A220637 A143003 * A012183 A012230 A270505

Adjacent sequences:  A193153 A193154 A193155 * A193157 A193158 A193159

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 16 2011

STATUS

approved

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Last modified March 22 10:07 EDT 2019. Contains 321421 sequences. (Running on oeis4.)