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A157426
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Lower left-hand x-coordinates of invisible 1x1 squares with 0 < x < y.
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3
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20, 35, 35, 54, 65, 69, 77, 84, 84, 95, 98, 98, 99, 99, 104, 104, 104, 110, 114, 114, 119, 119, 132, 132, 135, 135, 147, 153, 153, 159, 161, 170, 170, 170, 174, 174, 175, 185, 185, 186, 186, 188, 189, 189, 189, 189, 189, 195, 195, 195
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Eric Weisstein's World of Mathematics, Visible Point
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EXAMPLE
| {20, 14}, {35, 14}, {35, 20}, {54, 44}, {65, 39}, {69, 45}, {77, 21}, {84, 34}, {84, 50}, {95, 75}, ...
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CROSSREFS
| Cf. A157427,A157428,A157429.
Sequence in context: A060124 A068476 A003895 * A024747 A081962 A024755
Adjacent sequences: A157423 A157424 A157425 * A157427 A157428 A157429
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KEYWORD
| nonn
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AUTHOR
| E. W. Weisstein (eric(AT)weisstein.com), Mar 01, 2009
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