A197965 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,0,2,0,2,0,2 for x=0,1,2,3,4,5,6

1, 5, 23, 187, 3126, 99832, 5396026, 541886583, 102749440940

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 0's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 2'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..9.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............1..............0..............0..............0
.......0.0............1.0............0.0............0.0............0.0
......0.5.0..........2.2.0..........0.2.2..........0.5.0..........0.5.0
.....3.0.2.2........2.6.2.0........1.2.6.2........2.2.0.0........0.0.2.2
....1.0.2.6.2......0.2.2.4.2......2.4.2.2.0......0.2.4.2.2......3.0.2.6.2
...1.2.4.2.2.0....0.5.0.3.2.2....2.2.3.0.5.0....0.0.0.2.6.2....0.2.4.2.2.1
..0.2.2.0.0.3.0..0.0.0.0.0.0.0..1.0.0.0.0.0.0..0.0.3.1.2.2.0..1.2.2.0.0.0.1

Crossrefs

Sequence in context: A203204 A203119 A203214 * A198041 A197922 A226154

Adjacent sequences: A197962 A197963 A197964 * A197966 A197967 A197968

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved