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A269184
Number of nX6 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three exactly once.
1
1620, 118032, 12791896, 1265974992, 121792778352, 11426543880704, 1052109184130840, 95454531912315856, 8558619944786977592, 760020559893342078688, 66953271981144607663880, 5858534813761786497448832
OFFSET
1,1
COMMENTS
Column 6 of A269186.
LINKS
EXAMPLE
Some solutions for n=2
..2..3..3..3..2..1. .3..2..3..1..1..0. .0..0..2..1..0..0. .1..0..0..2..2..2
..3..3..3..3..3..3. .2..2..3..1..3..1. .2..2..0..0..0..2. .0..0..2..3..2..0
CROSSREFS
Cf. A269186.
Sequence in context: A345856 A206537 A269278 * A269150 A269212 A269095
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 20 2016
STATUS
approved