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 A221188 T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, vertical and antidiagonal neighbors in a random 0..2 nXk array 3
 1, 1, 1, 2, 6, 2, 4, 27, 27, 4, 7, 107, 274, 107, 7, 12, 461, 2648, 2648, 461, 12, 21, 1844, 23765, 51924, 23765, 1844, 21, 37, 7502, 203122, 928133, 928133, 203122, 7502, 37, 65, 29893, 1686374, 15638551, 32233374, 15638551, 1686374, 29893, 65, 114, 119342 (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.....6......27......107......461.....1844......7502....29893.119342 ..2....27.....274.....2648....23765...203122...1686374.13787513 ..4...107....2648....51924...928133.15638551.256020803 ..7...461...23765...928133.32233374 .12..1844..203122.15638551 .21..7502.1686374 .37.29893 .65 LINKS R. H. Hardin, Table of n, a(n) for n = 1..49 EXAMPLE Some solutions for n=3 k=4 ..0..0..0..0....1..0..1..0....1..0..0..0....0..0..0..0....1..1..1..1 ..0..0..1..1....0..1..0..1....0..0..1..1....0..0..0..1....0..0..0..0 ..1..1..1..0....0..1..1..0....1..0..0..1....0..0..1..0....1..1..1..1 CROSSREFS Column 1 is A005251(n+1) Column 2 is A220529 Sequence in context: A220375 A220430 A220279 * A220532 A060295 A102912 Adjacent sequences:  A221185 A221186 A221187 * A221189 A221190 A221191 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 04 2013 STATUS approved

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Last modified January 26 01:48 EST 2020. Contains 331270 sequences. (Running on oeis4.)