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A220751 T(n,k)=Equals one maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and vertical neighbors in a random 0..3 nXk array 4
1, 2, 2, 4, 8, 4, 8, 38, 38, 8, 16, 176, 395, 176, 16, 32, 816, 3778, 3778, 816, 32, 64, 3616, 32178, 65084, 32178, 3616, 64, 128, 15362, 261356, 1048014, 1048014, 261356, 15362, 128, 256, 63484, 2096110, 16776688, 33553757, 16776688, 2096110, 63484, 256, 512 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

...1......2........4.........8.........16.........32..........64........128

...2......8.......38.......176........816.......3616.......15362......63484

...4.....38......395......3778......32178.....261356.....2096110...16776148

...8....176.....3778.....65084....1048014...16776688...268434892.4294966696

..16....816....32178...1048014...33553757.1073741200.34359737562

..32...3616...261356..16776688.1073741200

..64..15362..2096110.268434892

.128..63484.16776148

.256.258180

.512

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..60

EXAMPLE

Some solutions for n=3 k=4

..0..0..1..0....0..1..0..0....1..1..1..1....1..0..0..0....1..1..0..0

..0..0..1..1....0..1..0..1....0..0..0..0....1..1..0..0....0..0..1..0

..0..1..1..1....1..0..0..0....0..1..0..0....0..0..1..1....0..0..0..1

CROSSREFS

Column 1 is A000079(n-1)

Column 2 is A220542

Sequence in context: A220810 A221024 A220545 * A220967 A221590 A137778

Adjacent sequences:  A220748 A220749 A220750 * A220752 A220753 A220754

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Dec 18 2012

STATUS

approved

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Last modified February 25 11:25 EST 2020. Contains 332233 sequences. (Running on oeis4.)