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A220319 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..2 nXk array 3
1, 1, 1, 2, 5, 2, 4, 24, 24, 4, 7, 89, 353, 89, 7, 12, 389, 3167, 3167, 389, 12, 21, 1566, 28215, 56819, 28215, 1566, 21, 37, 6401, 237144, 984087, 984087, 237144, 6401, 37, 65, 25704, 1944692, 16290350 (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.....24.....89....389.....1566....6401.25704

..2...24....353...3167..28215...237144.1944692

..4...89...3167..56819.984087.16290350

..7..389..28215.984087

.12.1566.237144

.21.6401

.37

LINKS

Table of n, a(n) for n=1..40.

EXAMPLE

Some solutions for n=3 k=4

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

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

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

CROSSREFS

Column 1 is A005251(n+1)

Sequence in context: A122581 A151871 A220247 * A220342 A221676 A073054

Adjacent sequences:  A220316 A220317 A220318 * A220320 A220321 A220322

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Dec 10 2012

STATUS

approved

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Last modified August 17 17:59 EDT 2022. Contains 356189 sequences. (Running on oeis4.)