A193874 - OEIS

A193874

Number of nXnXn triangular 0..3 arrays with no element equal to the difference mod 4 of any two of its neighbors

4, 36, 103, 1179, 33943, 2110051, 268635167, 68723825153, 35184506013367, 36028802839103173, 73786976651882166835, 302231454934581155492511, 2475880078574541543008355341, 40564819207303993488253830603201

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..17

EXAMPLE

Some solutions for 4X4X4

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

....1.1......2.2......1.1......3.3......3.2......3.3......2.3......1.1

...4.1.4....2.3.2....1.1.1....2.3.3....2.3.3....2.2.3....3.3.3....1.1.4

..4.1.4.1..2.3.3.3..1.1.3.1..3.2.2.2..2.2.2.2..3.3.2.2..2.2.2.3..1.1.1.4

CROSSREFS

Sequence in context: A361719 A016826 A190318 * A254939 A038688 A362751

Adjacent sequences: A193871 A193872 A193873 * A193875 A193876 A193877

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 07 2011

STATUS

approved