A193186 Number of nXnXn triangular 0..6 arrays with no element equal to the sum mod 7 of any two neighbors

7, 216, 6258, 405648, 85784844, 49610954646, 76881172019418

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for 4X4X4
.....3........4........0........4........3........0........0........3
....3.5......3.3......3.2......3.3......1.6......4.2......1.4......6.1
...4.3.3....2.2.2....4.4.4....2.2.3....4.6.4....3.3.4....0.0.2....6.6.6
..3.4.4.2..3.3.3.3..2.4.3.4..3.3.4.4..4.4.6.4..3.4.3.3..5.1.4.0..4.1.6.4

Crossrefs

Sequence in context: A046033 A193836 A193877 * A114939 A193224 A319538

Adjacent sequences: A193183 A193184 A193185 * A193187 A193188 A193189

Keyword

nonn

Author

R. H. Hardin Jul 17 2011

Status

approved