A197720 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,3,1,1,0,0,0 for x=0,1,2,3,4,5,6

1, 1, 22, 87, 1726, 68819, 4003781, 565032173, 152764693020, 80175405643606

Offset

1,3

Comments

Every 0 is next to 0 2's, every 1 is next to 1 3's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 0'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..10.

Example

Some solutions with all values from 0 to 6 for 6X6X6
.......2............0............2............0............0............0
......1.1..........0.4..........1.1..........0.0..........4.0..........4.0
.....1.3.0........0.0.0........1.3.0........0.6.0........0.0.0........0.0.4
....0.0.5.0......0.5.0.0......0.0.5.0......1.0.0.0......0.0.5.0......0.5.0.0
...0.6.0.0.4....1.3.0.6.0....0.6.0.0.4....1.3.5.0.0....0.6.0.3.1....1.3.0.6.0
..0.0.0.0.0.0..2.1.1.0.0.0..0.0.0.4.0.0..2.1.0.0.4.0..0.0.0.1.1.2..2.1.1.0.0.0

Crossrefs

Sequence in context: A044590 A125243 A298443 * A195323 A041940 A041942

Adjacent sequences: A197717 A197718 A197719 * A197721 A197722 A197723

Keyword

nonn

Author

R. H. Hardin Oct 17 2011

Status

approved