A198092 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 1,3,2,2,0,0,2 for x=0,1,2,3,4,5,6

1, 2, 8, 38, 587, 9649, 374209, 27337248, 3366388352, 804248984354

Offset

1,2

Comments

Every 0 is next to 0 1's, every 1 is next to 1 3's, every 2 is next to 2 2'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 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..............0..............0
.......0.4............0.0............2.2............2.2............2.0
......4.0.0..........0.0.0..........2.6.2..........2.6.2..........2.2.0
.....0.0.5.0........4.0.5.0........0.2.2.1........1.2.2.0........1.3.0.4
....0.4.0.2.2......0.0.0.2.2......0.4.0.3.2......2.3.0.5.0......2.2.0.0.0
...0.2.3.2.6.2....0.2.3.2.6.2....4.0.5.0.2.2....2.2.0.0.0.4....2.6.2.5.0.2
..0.2.2.1.2.2.0..0.2.2.1.2.2.0..0.0.0.0.0.0.0..0.0.0.0.4.0.0..0.2.2.0.0.2.2

Crossrefs

Sequence in context: A203122 A207157 A198049 * A207162 A101714 A077318

Adjacent sequences: A198089 A198090 A198091 * A198093 A198094 A198095

Keyword

nonn

Author

R. H. Hardin Oct 21 2011

Status

approved