A197785 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,6,1,0,0,0,1 for x=0,1,2,3,4,5,6

1, 1, 7, 64, 805, 21526, 1060565, 95311741, 15835547951, 4848154085309, 2730611548295716, 2833706084143411564

Offset

1,3

Comments

Every 0 is next to 0 2's, every 1 is next to 1 6's, every 2 is next to 2 1's, every 3 is next to 3 0'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 with all values from 0 to 6 for 6X6X6
.......2............2............0............0............2............0
......1.1..........1.1..........0.0..........3.0..........1.1..........0.0
.....1.6.1........1.6.1........0.4.3........0.4.0........1.6.1........0.5.0
....0.1.1.0......0.1.1.0......1.1.0.0......0.0.1.1......0.1.1.0......3.0.1.1
...0.4.0.5.0....0.4.0.5.0....1.6.1.5.0....0.5.1.6.1....3.4.0.5.0....0.4.1.6.1
..0.0.3.0.0.0..0.3.0.0.0.0..2.1.1.0.0.0..0.0.0.1.1.2..0.0.0.0.0.0..0.0.0.1.1.2

Crossrefs

Sequence in context: A008787 A261500 A173516 * A360465 A252654 A352841

Adjacent sequences: A197782 A197783 A197784 * A197786 A197787 A197788

Keyword

nonn

Author

R. H. Hardin Oct 18 2011

Status

approved