A198087 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,5,4,0,0,1,0 for x=0,1,2,3,4,5,6

1, 1, 7, 51, 580, 14960, 692710, 57268094, 9248071023, 2766940534117, 1541427833628443

Offset

1,3

Comments

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

Links

Table of n, a(n) for n=1..11.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............0..............0..............0..............0
.......0.0............1.1............0.0............0.0............0.0
......0.6.0..........1.5.1..........0.6.0..........0.6.0..........0.4.0
.....0.0.0.0........0.3.1.0........0.0.0.0........0.0.0.0........0.2.4.0
....0.4.0.3.1......0.0.0.0.0......1.3.0.4.0......1.1.0.4.2......1.1.0.0.0
...0.4.2.1.5.1....0.6.0.4.4.0....1.5.1.2.4.0....1.5.3.0.4.0....1.5.3.0.6.0
..0.0.0.0.1.1.0..0.0.0.0.2.0.0..0.1.1.0.0.0.0..0.1.1.0.0.0.0..0.1.1.0.0.0.0

Crossrefs

Sequence in context: A293073 A368286 A081216 * A124271 A220224 A198007

Adjacent sequences: A198084 A198085 A198086 * A198088 A198089 A198090

Keyword

nonn

Author

R. H. Hardin Oct 21 2011

Status

approved