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A220935
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T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..2 nXk array
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6
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1, 1, 1, 2, 4, 1, 4, 16, 12, 1, 7, 52, 92, 37, 1, 12, 200, 673, 556, 114, 1, 21, 792, 5912, 9107, 3332, 351, 1, 37, 3080, 48212, 172904, 123958, 19996, 1081, 1, 65, 12164, 395844, 2876430, 4983202, 1686304, 119972, 3329, 1, 114, 47827, 3232729, 49406891
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OFFSET
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1,4
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COMMENTS
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Table starts
.1....1......2.......4.......7......12.......21......37....65.114
.1....4.....16......52.....200.....792.....3080...12164.47827
.1...12.....92.....673....5912...48212...395844.3232729
.1...37....556....9107..172904.2876430.49406891
.1..114...3332..123958.4983202
.1..351..19996.1686304
.1.1081.119972
.1.3329
.1
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LINKS
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Table of n, a(n) for n=1..49.
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EXAMPLE
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Some solutions for n=3 k=4
..0..0..1..1....0..0..1..1....0..0..0..1....0..0..0..1....0..1..0..1
..0..1..1..0....0..1..1..1....1..0..1..1....0..0..0..1....0..0..0..1
..1..1..0..0....0..0..0..0....0..0..0..0....1..0..1..0....1..0..0..0
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CROSSREFS
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Column 2 is A099098
Row 1 is A005251(n+1)
Sequence in context: A204021 A236471 A220328 * A221290 A078739 A004597
Adjacent sequences: A220932 A220933 A220934 * A220936 A220937 A220938
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KEYWORD
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nonn,tabl
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AUTHOR
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R. H. Hardin Dec 25 2012
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STATUS
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approved
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