A198057 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,6,0,2,0,0,1 for x=0,1,2,3,4,5,6

1, 4, 15, 75, 879, 15766, 530019, 30323508, 2989066962, 507557052083

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 6's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 0's, every 5 is next to 5 0'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..............2..............2..............0..............0
.......0.0............0.0............0.0............0.0............0.0
......4.0.0..........0.5.0..........0.5.0..........0.0.0..........2.1.1
.....0.0.3.2........0.4.0.0........2.0.4.0........0.5.0.2........0.1.6.1
....1.1.2.2.0......1.1.0.0.2......3.2.0.1.1......0.4.0.1.1......0.0.1.1.0
...1.6.1.0.5.0....1.6.1.4.2.3....0.2.3.1.6.1....2.2.0.1.6.1....0.5.0.2.0.4
..0.1.1.2.0.0.2..0.1.1.0.0.2.0..2.0.2.0.1.1.0..0.3.2.0.1.1.0..2.0.2.3.2.0.0

Crossrefs

Sequence in context: A020037 A086365 A032270 * A263004 A002750 A178887

Adjacent sequences: A198054 A198055 A198056 * A198058 A198059 A198060

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved