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Search: id:A158022
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| A158022 |
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Integers n such that all the digits needed to write the consecutive nonnegative integers from 0 to n fill exactly a square (no holes, no overlaps). |
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+0
2
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| 0, 3, 8, 12, 22, 36, 54, 76, 101, 121, 132, 156, 169, 197, 212, 244, 261, 297, 316, 356, 377, 421, 444, 492, 517, 569, 596, 652, 681, 741, 772, 836, 869, 937, 972, 10221, 10626, 11041, 11466, 11901, 12346, 12801, 13266, 13741, 14226, 14721, 15226
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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The sides of the successive squares are given by A158023. Terms computed by Jean-Marc Falcoz.
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LINKS
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Eric Angelini, Digit Spiral
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EXAMPLE
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...0...01...012...0123...012345
.......23...345...4567...678910
............678...8910...111213
..................1112...141516
.........................171819
.........................202122
The integers fitting exactly in the SE corner of the above squares are 0, 3, 8, 12, 22. There is no 5x5 square where this is possible.
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CROSSREFS
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Sequence in context: A103888 A014255 A022407 this_sequence A007434 A128303 A123906
Adjacent sequences: A158019 A158020 A158021 this_sequence A158023 A158024 A158025
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KEYWORD
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base,nonn
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AUTHOR
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Eric Angelini (eric.angelini(AT)skynet.be), Mar 11 2009
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