A198028 - OEIS

A198028

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

1, 1, 7, 28, 271, 5297, 99050, 3532980, 245893069, 22704931721

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

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

.......0.0............1.1............0.0............1.0............1.3

......0.6.0..........3.4.3..........0.5.0..........3.4.1..........1.4.1

.....1.0.0.0........1.1.1.1........1.2.0.0........1.1.1.3........3.1.2.0

....3.1.2.5.0......1.0.0.0.0......3.1.0.0.0......0.0.0.2.1......1.2.0.0.0

...1.4.1.0.0.0....3.2.5.0.6.0....1.4.1.0.6.0....0.6.0.5.0.0....0.0.5.0.6.0

..2.1.3.1.0.0.0..1.1.0.0.0.0.0..2.1.3.1.0.0.0..0.0.0.0.0.0.0..0.0.0.0.0.0.0

CROSSREFS

Sequence in context: A058822 A054369 A185360 * A244300 A203209 A193288

Adjacent sequences: A198025 A198026 A198027 * A198029 A198030 A198031

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 20 2011

STATUS

approved