A198051 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 0,0,0,1,1,1,1 for x=0,1,2,3,4,5,6

1, 3, 4, 47, 453, 5584, 308351, 13078670, 1255831278, 258372554787

Offset

1,2

Comments

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

Links

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

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............1..............1..............0..............1
.......1.1............1.0............1.0............1.1............0.1
......1.6.1..........1.1.2..........3.1.2..........1.6.1..........2.4.1
.....0.1.1.0........0.1.3.0........0.1.3.0........0.1.1.0........0.1.1.0
....1.4.4.1.1......1.1.4.1.1......1.1.5.1.2......1.1.5.1.2......1.1.5.1.2
...1.1.1.5.1.3....1.5.3.1.6.1....1.6.1.1.4.0....1.1.1.4.1.0....1.6.1.4.1.0
..0.2.0.1.1.0.1..0.1.1.0.1.1.0..0.1.1.0.1.1.1..1.0.2.0.1.3.1..0.1.1.0.1.3.1

Crossrefs

Sequence in context: A032838 A013336 A264509 * A032839 A056855 A208653

Adjacent sequences: A198048 A198049 A198050 * A198052 A198053 A198054

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved