A193183 Number of nXnXn triangular 0..3 arrays with no element equal to the sum mod 4 of any two neighbors.

4, 36, 95, 1169, 33801, 2107545, 268584665, 68722397483, 35184451704151, 36028800045063009, 73786976454230149101, 302231454915324617869969, 2475880078571947551781268217, 40564819207303508564612061601737

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

Some solutions for 4X4X4
.....3........1........1........3........3........3........3........2
....3.3......2.2......3.3......1.3......3.3......1.1......3.1......2.2
...1.1.3....2.3.2....3.1.3....3.1.3....3.1.1....1.1.1....3.3.1....1.2.2
..3.1.1.1..2.2.2.2..3.1.1.1..3.3.1.3..1.3.3.1..3.1.1.3..1.1.3.3..2.2.2.2

Crossrefs

Sequence in context: A072157 A075215 A193833 * A152760 A361719 A016826

Adjacent sequences: A193180 A193181 A193182 * A193184 A193185 A193186

Keyword

nonn

Author

R. H. Hardin, Jul 17 2011

Status

approved