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 A220579 T(n,k)=Equals one maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 nXk array 13
 1, 2, 1, 4, 8, 1, 8, 21, 32, 1, 16, 115, 91, 128, 1, 32, 371, 1441, 375, 512, 1, 64, 1504, 8334, 17505, 1487, 2048, 1, 128, 5240, 64497, 165130, 205323, 5835, 8192, 1, 256, 19904, 436288, 2652007, 3162375, 2352642, 22775, 32768, 1, 512, 71787, 3036588 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts .1.......2.......4..........8..........16...........32...........64.........128 .1.......8......21........115.........371.........1504.........5240.......19904 .1......32......91.......1441........8334........64497.......436288.....3036588 .1.....128.....375......17505......165130......2652007.....33180533...450926562 .1.....512....1487.....205323.....3162375....106841503...2449921734.65126683335 .1....2048....5835....2352642....59690533...4239598056.178051989526 .1....8192...22775...26616961..1120269376.166807007000 .1...32768...88683..299065708.20961430054 .1..131072..344975.3347252663 .1..524288.1341395 .1.2097152 .1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..82 EXAMPLE Some solutions for n=3 k=4 ..1..1..0..0....0..1..1..1....0..0..0..1....0..0..1..1....1..0..0..1 ..0..1..1..1....1..0..0..1....0..0..0..1....1..0..1..0....0..0..0..1 ..1..1..0..1....1..0..0..1....1..0..1..1....0..1..0..0....1..1..1..1 CROSSREFS Column 2 is A004171(n-1) Row 1 is A000079(n-1) Sequence in context: A011234 A208917 A161381 * A330787 A128412 A221660 Adjacent sequences: A220576 A220577 A220578 * A220580 A220581 A220582 KEYWORD nonn,tabl AUTHOR R. H. Hardin Dec 16 2012 STATUS approved

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Last modified May 22 19:06 EDT 2024. Contains 372758 sequences. (Running on oeis4.)