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A270117
Number of nX7 0..7 arrays with some element plus some horizontally or vertically adjacent neighbor totalling seven exactly once.
1
806736, 932758314432, 587581295287557312, 310047482243688075320784, 150106896816846862603331679744, 69055044905731486960323236937432480, 30710864722727618437291310619830386096704
OFFSET
1,1
COMMENTS
Column 7 of A270118.
LINKS
EXAMPLE
Some solutions for n=1
..4..2..3..1..6..3..7. .2..0..4..1..2..5..1. .4..2..4..3..7..6..7
CROSSREFS
Cf. A270118.
Sequence in context: A214148 A272692 A186585 * A178290 A083617 A343082
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 11 2016
STATUS
approved