A197593 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 1,6,4,6,0,0,1 for x=0,1,2,3,4,5,6

1, 1, 4, 18, 98, 1460, 35691, 1385653, 113578137, 17175107452, 4747357788947, 2462207136693903

Offset

1,3

Comments

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

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for 5X5X5
......0..........0..........0..........0..........0..........0..........0
.....0.0........0.0........0.0........0.0........0.0........0.0........4.0
....2.4.0......0.5.0......0.4.2......4.0.0......4.0.0......4.0.0......0.0.0
...0.4.0.4....0.5.0.0....4.0.4.0....0.0.0.0....0.0.0.4....0.0.0.4....0.0.0.0
..0.0.0.0.0..0.0.0.0.0..0.0.0.0.0..0.0.0.4.0..0.4.0.0.0..0.0.0.0.0..0.4.0.0.0

Crossrefs

Sequence in context: A020072 A020027 A263688 * A084832 A135177 A244309

Adjacent sequences: A197590 A197591 A197592 * A197594 A197595 A197596

Keyword

nonn

Author

R. H. Hardin Oct 16 2011

Status

approved