A197993 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,5,2,0,0,0,2 for x=0,1,2,3,4,5,6

1, 2, 11, 118, 2811, 137304, 13763054, 2894774077, 1268119967528, 1154890807376002

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..10.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............0..............0..............0..............0
.......3.0............0.3............0.4............0.3............0.0
......0.2.2..........3.3.0..........1.0.0..........2.2.0..........0.5.0
.....0.2.6.2........0.0.4.0........0.5.0.0........2.6.2.0........3.0.1.0
....0.0.2.2.0......1.5.0.2.2......0.0.0.2.2......0.2.2.0.0......0.4.0.2.2
...0.5.0.0.4.0....0.0.0.2.6.2....3.4.4.2.6.2....4.0.3.0.5.0....2.2.0.2.6.2
..0.1.0.4.0.3.0..0.0.0.0.2.2.0..0.0.0.0.2.2.0..0.0.3.0.0.1.0..0.2.0.0.2.2.0

Crossrefs

Sequence in context: A269082 A304639 A130222 * A057076 A346650 A251663

Adjacent sequences: A197990 A197991 A197992 * A197994 A197995 A197996

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved