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A220935 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 6
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 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

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

LINKS

Table of n, a(n) for n=1..49.

EXAMPLE

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

CROSSREFS

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

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Dec 25 2012

STATUS

approved

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Last modified September 19 16:34 EDT 2021. Contains 347564 sequences. (Running on oeis4.)