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A265638 Number of 4Xn 0..4*n-1 arrays with upper left zero and lower right 4*n-1 and each element differing from its horizontal, diagonal and antidiagonal neighbors by a power of two. 1
16, 585, 35328, 2723409, 1299561587, 361488020990, 119394507902804, 16937773173058482, 5337007476880963123, 1131086756675633606854, 434352600687189806198473, 97056545070160030733038499 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 4 of A265635.
LINKS
EXAMPLE
Some solutions for n=3
..0..4..6....0..4..6....0..8..6....0..4..8....0..4..3....0..1..3....0..4..2
..8..4..5....6..4..8....9..8..6....6..4..8....5..4..5....9..1..3....3..4..5
..8..9..5....6..7..6....9..7..9....2.10..8....6..7..6....5..7..5....5..7..8
..8..9.11....6..7.11....3..7.11....8.10.11....8.10.11....8..7.11....8..7.11
CROSSREFS
Cf. A265635.
Sequence in context: A210829 A222845 A187403 * A307943 A171210 A266129
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 11 2015
STATUS
approved

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Last modified May 19 00:35 EDT 2024. Contains 372666 sequences. (Running on oeis4.)