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A208584 Number of 4Xn nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors 0
15, 3233, 3012383, 7289707650, 35787552851324, 309603034324088207 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A208581

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

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

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

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

CROSSREFS

Sequence in context: A232455 A208579 A080691 * A211903 A278630 A161584

Adjacent sequences:  A208581 A208582 A208583 * A208585 A208586 A208587

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 29 2012

STATUS

approved

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Last modified October 19 14:45 EDT 2021. Contains 348090 sequences. (Running on oeis4.)