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A208407
Number of nX7 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors
1
715, 10370330, 157873031498, 2403711876698218, 36598079445605633928, 557229580446475130201608, 8484183047877022205116428184, 129177209027669581083328287797640, 1966807085374417176424317546443585928
OFFSET
1,1
COMMENTS
Column 7 of A208408
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0..1..2..1....0..0..0..1..0..0..0....0..0..0..0..0..0..0
..1..1..0..2..1..3..3....1..0..2..2..1..1..2....0..1..0..1..0..2..1
..1..2..0..2..2..1..2....2..0..1..3..1..3..1....0..2..2..3..0..0..1
..0..0..1..0..2..2..0....0..3..3..3..2..1..3....0..3..3..3..3..1..3
CROSSREFS
Sequence in context: A208174 A200800 A208200 * A208414 A214237 A252467
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 26 2012
STATUS
approved