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A193877 Number of nXnXn triangular 0..6 arrays with no element equal to the difference mod 7 of any two of its neighbors 0
7, 216, 3636, 152574, 21331380, 7767784824, 7384820647122, 18209251766239734 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for 4X4X4

.....1........4........2........3........2........1........2........4

....4.4......1.1......2.2......3.3......2.2......1.4......3.2......3.3

...1.4.4....1.1.4....3.3.2....2.2.3....2.2.2....1.1.4....3.2.2....3.3.3

..4.4.1.1..1.1.4.4..3.2.2.2..2.2.3.3..2.2.2.2..4.1.1.4..3.3.2.3..3.2.2.2

CROSSREFS

Sequence in context: A045760 A046033 A193836 * A193186 A114939 A193224

Adjacent sequences:  A193874 A193875 A193876 * A193878 A193879 A193880

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 07 2011

STATUS

approved

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Last modified October 5 08:23 EDT 2022. Contains 357252 sequences. (Running on oeis4.)