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A265493
Number of nX7 0..n*7-1 arrays with upper left zero and lower right n*7-1 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two.
0
456, 1030, 294152, 595253, 949287922, 223328748, 316185648156135, 121504746202, 15215491198062021, 145636281907673112
OFFSET
1,1
COMMENTS
Column 7 of A265494.
EXAMPLE
Some solutions for n=2
..0..4..5..9.10.11..9....0..4..5..9.13.11..9....0..4..5..3..7..5..9
..4..2..3..7.11.12.13....4..8..6..7.11..9.13....1..2..3..7.11..9.13
CROSSREFS
Cf. A265494.
Sequence in context: A203058 A116331 A099650 * A265600 A222552 A200784
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 09 2015
STATUS
approved