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A222275 T(n,k) = Number of n X k 0..3 arrays with exactly floor(n X k/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order. 7
1, 0, 0, 0, 0, 0, 3, 4, 4, 3, 4, 13, 4, 13, 4, 8, 40, 81, 81, 40, 8, 10, 162, 364, 1042, 364, 162, 10, 55, 888, 5996, 15309, 15309, 5996, 888, 55, 72, 3617, 27980, 259827, 204555, 259827, 27980, 3617, 72, 294, 18136, 507909, 4721919, 12855928, 12855928, 4721919 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,7
COMMENTS
Table starts
....1......0........0..........3...........4...........8..........10
....0......0........4.........13..........40.........162.........888
....0......4........4.........81.........364........5996.......27980
....3.....13.......81.......1042.......15309......259827.....4721919
....4.....40......364......15309......204555....12855928...216228179
....8....162.....5996.....259827....12855928...725139202.46568936746
...10....888....27980....4721919...216228179.46568936746
...55...3617...507909...86605540.15688878354
...72..18136..2380692.1596666209
..294..81560.44501178
..378.407644
.1883
LINKS
EXAMPLE
Some solutions for n=3, k=4
..0..0..0..1....0..0..0..0....0..0..1..1....0..0..0..1....0..1..1..1
..0..0..1..1....0..0..0..0....0..0..1..1....0..0..1..1....2..1..1..1
..0..1..1..1....1..0..0..2....0..0..0..1....0..0..0..1....2..2..1..1
CROSSREFS
Sequence in context: A035004 A222290 A222430 * A355017 A000916 A323846
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 14 2013
STATUS
approved

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Last modified February 23 21:40 EST 2024. Contains 370288 sequences. (Running on oeis4.)