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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 June 22 05:36 EDT 2024. Contains 373565 sequences. (Running on oeis4.)