A197922 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 4,0,2,0,1,0,0 for x=0,1,2,3,4,5,6

1, 5, 23, 190, 3128, 98103, 5219891, 503752197, 89485444907

Offset

1,2

Comments

Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 1's, every 5 is next to 5 0's, every 6 is next to 6 0's

Links

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

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............2..............1..............0..............0
.......2.0............2.2............0.1............0.0............0.0
......2.2.0..........0.3.0..........2.1.4..........0.6.0..........0.6.0
.....0.0.5.0........0.0.5.0........2.2.1.1........0.0.0.0........0.0.0.0
....1.3.0.0.0......1.3.0.0.0......0.0.0.3.0......3.0.2.2.1......1.3.0.5.0
...1.4.3.0.6.0....1.4.3.0.6.0....0.6.0.5.0.3....0.5.0.2.4.1....1.4.3.0.2.0
..0.1.1.0.0.0.0..0.1.1.0.0.0.0..0.0.0.0.0.3.0..0.0.0.0.1.1.0..0.1.1.0.2.2.1

Crossrefs

Sequence in context: A203214 A197965 A198041 * A226154 A203223 A173041

Adjacent sequences: A197919 A197920 A197921 * A197923 A197924 A197925

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved