A197721 - OEIS

A197721

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

1, 7, 25, 409, 14185, 1029761, 168151040, 60063611063, 47206720536227, 81729461999719503

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

OFFSET

1,2

COMMENTS

Every 0 is next to 0 2's, every 1 is next to 1 1's, every 2 is next to 2 1's, every 3 is next to 3 0's, every 4 is next to 4 0'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 6X6X6

.......0............0............0............2............0............2

......0.4..........0.0..........0.0..........1.1..........4.0..........1.1

.....0.0.0........0.6.0........0.6.0........0.0.3........0.0.1........3.0.0

....0.6.0.0......4.0.0.3......0.0.0.0......0.6.0.0......0.6.0.1......0.0.6.0

...1.0.0.5.0....0.0.5.0.1....4.0.5.3.1....0.0.0.5.1....1.0.0.5.0....0.5.0.0.4

..2.1.0.3.0.0..0.0.3.0.1.2..0.0.0.0.1.2..0.0.4.0.0.1..2.1.3.0.0.0..0.3.0.4.0.0

CROSSREFS

Sequence in context: A198022 A231579 A364644 * A261421 A081298 A318633

Adjacent sequences: A197718 A197719 A197720 * A197722 A197723 A197724

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 17 2011

STATUS

approved