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A220247 T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..1 nXk array 5
1, 1, 1, 2, 5, 2, 4, 18, 18, 4, 7, 37, 143, 37, 7, 12, 85, 816, 816, 85, 12, 21, 184, 4467, 7140, 4467, 184, 21, 37, 393, 27192, 64258, 64258, 27192, 393, 37, 65, 826, 158296, 660677, 942945, 660677, 158296, 826, 65, 114, 1726, 915920, 6228324, 16925474 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Table starts

...1....1.......2........4.........7........12........21.......37........65

...1....5......18.......37........85.......184.......393......826......1726

...2...18.....143......816......4467.....27192....158296...915920...5443662

...4...37.....816.....7140.....64258....660677...6228324.59704733.580593280

...7...85....4467....64258....942945..16925474.267978208

..12..184...27192...660677..16925474.535851061

..21..393..158296..6228324.267978208

..37..826..915920.59704733

..65.1726.5443662

.114.3568

.200

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..70

EXAMPLE

Some solutions for n=3 k=4

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

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

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

CROSSREFS

Column 1 is A005251(n+1)

Sequence in context: A216625 A122581 A151871 * A220319 A220342 A221676

Adjacent sequences:  A220244 A220245 A220246 * A220248 A220249 A220250

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Dec 08 2012

STATUS

approved

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Last modified September 28 00:09 EDT 2022. Contains 357063 sequences. (Running on oeis4.)