A215902 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A215902

Number of diagonal and antidiagonal neighbor colorings of the even squares of an nX6 array with new integer colors introduced in row major order

5, 52, 2906, 373780, 87852626, 33093356640, 18383354944364, 14216420563705724, 14670987605491079080, 19558496206477343793824, 32828323775130245290328888, 67939294184937980415465539016, 170381709311721603692658697682568

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

OFFSET

1,1

COMMENTS

Column 6 of A215904

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..15

EXAMPLE

Some solutions for n=3

..0..x..1..x..1..x....0..x..1..x..2..x....0..x..1..x..2..x....0..x..1..x..2..x

..x..2..x..3..x..2....x..3..x..3..x..1....x..3..x..3..x..4....x..3..x..0..x..4

..4..x..5..x..4..x....2..x..2..x..4..x....1..x..1..x..2..x....2..x..5..x..2..x