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A269142
Number of nX7 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three no more than once.
1
8748, 2727564, 732561916, 186315931804, 45920055321732, 11067174233536260, 2621894498331024092, 612729907775635265268, 141617828339474744759764, 32434464000726413874379876, 7371987566769862222037312812
OFFSET
1,1
COMMENTS
Column 7 of A269143.
LINKS
EXAMPLE
Some solutions for n=1
..1..3..3..1..1..3..2. .2..3..3..2..2..2..1. .2..2..3..1..0..0..2
CROSSREFS
Cf. A269143.
Sequence in context: A203377 A183361 A269193 * A269200 A269108 A269288
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 20 2016
STATUS
approved