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A208472 Number of 7Xn 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 0
877, 190899322, 470798015742024, 6105599904286957450405, 279322601688949336349340289673, 35487456577214016192433880229514302813, 10658767342117292737413813034097966371526603430 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 7 of A208466
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..1..0..0....0..1..2..0....0..1..0..0....0..1..0..0....0..1..0..0
..0..0..1..0....0..0..0..0....0..0..1..0....0..0..1..0....0..0..1..0
..0..0..1..0....0..1..0..0....0..0..0..0....1..0..0..0....0..0..0..0
..0..0..0..0....2..0..1..0....0..1..0..0....0..1..1..0....0..1..0..0
..0..1..0..0....0..1..0..0....0..2..0..0....0..0..0..1....1..0..1..0
..1..0..1..0....0..0..1..0....0..0..1..0....0..1..0..0....0..0..0..0
CROSSREFS
Sequence in context: A208307 A208787 A208587 * A093943 A252437 A129313
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 27 2012
STATUS
approved

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Last modified February 26 05:55 EST 2024. Contains 370335 sequences. (Running on oeis4.)