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A265215
Number of (2n-1)X4 0..8n-5 arrays with upper left zero and lower right 8n-5 and each element differing from its horizontal and vertical neighbors by a power of three.
1
4, 17740, 361386063, 7949178726430, 453490948990318650, 41885608967085610717560, 2119003158795758114407105871, 127423261361014819748790685468801, 7872947094973478224838397154507741251
OFFSET
1,1
COMMENTS
Column 4 of A265218 (nonzero terms).
LINKS
EXAMPLE
Some solutions for n=2
..0..1.10..1....0..1..4..3....0..3..6..3....0..3..4..3....0..3..2..5
..9.10.11.10....1..2..5..2....9..6..5..2....3..0..1..2....1..2..5..2
.10..1.10.11....0..1..2.11....0..9..8.11....6..9.10.11....4..5..2.11
CROSSREFS
Cf. A265218.
Sequence in context: A003832 A162703 A258101 * A070157 A003556 A331667
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 05 2015
EXTENSIONS
Extended b-file from 14 to 48, correct b(14), R. H. Hardin, Dec 06 2015
STATUS
approved