A208471 - OEIS

A208471

Number of 6Xn nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors

203, 4213597, 675203938944, 441285917587055633, 838683310903953794594668, 3787532222733253394267947322830

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

OFFSET

1,1

COMMENTS

Row 6 of A208466

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

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

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

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

..0..1..2..0....0..1..0..0....2..0..0..3....0..1..0..0....0..1..0..0

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

CROSSREFS

Sequence in context: A208786 A208586 A208465 * A348823 A198722 A198913

Adjacent sequences: A208468 A208469 A208470 * A208472 A208473 A208474

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 27 2012

STATUS

approved