A203203 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,4,2,0,0,0,2 for x=0,1,2,3,4,5,6

1, 2, 11, 145, 4950, 337440, 52523314, 18534928813, 14760206822407, 26441561136591477

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 4'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..............2..............0
.......0.3............0.4............2.2............2.2............2.2
......2.2.0..........3.0.0..........2.6.2..........0.0.3..........2.6.2
.....2.6.2.0........0.1.4.1........0.2.2.0........0.5.0.0........0.2.2.0
....0.2.2.0.0......2.2.0.0.0......0.0.0.1.0......0.4.0.2.2......0.0.3.0.0
...0.4.1.3.5.0....2.6.2.0.5.3....0.5.0.4.1.0....0.1.0.2.6.2....0.4.0.4.5.0
..0.0.0.0.0.0.0..0.2.2.0.0.0.0..0.3.0.0.0.0.0..0.0.3.0.2.2.0..0.1.1.0.0.0.0

Crossrefs

Sequence in context: A268743 A348797 A204243 * A046912 A185245 A006122

Adjacent sequences: A203200 A203201 A203202 * A203204 A203205 A203206

Keyword

nonn

Author

R. H. Hardin Dec 30 2011

Status

approved