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Search: id:A158023
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| A158023 |
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Sides of squares which are filled exactly (no holes, no overlaps) by the digits needed to write a subsequence of consecutive nonnegative integers starting with 0. |
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+0
2
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| 1, 2, 3, 4, 6, 8, 10, 12, 14, 16, 17, 19, 20, 22, 23, 25, 26, 28, 29, 31, 32, 34, 35, 37, 38, 40, 41, 43, 44, 46, 47, 49, 50, 52, 53, 200, 205, 210, 215, 220, 225, 230, 235, 240, 245, 250, 255, 260, 265, 270, 275, 280, 285, 290, 295, 300, 305, 310, 315, 320, 325, 330
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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The integers fitting exactly in a "nonnegative-integers-digits square" are given by A158022. 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 above squares, filled exactly by a subsequence of nonnegative integers starting with 0, have sides 1, 2, 3, 4, 6. There is no side-5 square with this property. The next properly filled square will have side 6.
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CROSSREFS
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Sequence in context: A034884 A137291 A032954 this_sequence A004271 A004278 A068670
Adjacent sequences: A158020 A158021 A158022 this_sequence A158024 A158025 A158026
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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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