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A222275 T(n,k)=Number of nXk 0..3 arrays with exactly floor(nXk/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

R. H. Hardin, Table of n, a(n) for n = 1..84

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 * A000916 A323846 A014241

Adjacent sequences:  A222272 A222273 A222274 * A222276 A222277 A222278

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 14 2013

STATUS

approved

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Last modified January 29 09:18 EST 2022. Contains 350672 sequences. (Running on oeis4.)