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Search: id:A051022
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| A051022 |
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Interpolate 0's between each pair of digits of n. |
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+0
4
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| 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 500, 501, 502, 503, 504, 505
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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These numbers have the same decimal and negadecimal representations.
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LINKS
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Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
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FORMULA
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Sums a_i*100^e_i with 0 <= a_i < 10.
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EXAMPLE
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a(23)=203
a(99)=909
a(100)=10000
a(101)=10001
a(111)=10101
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CROSSREFS
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Cf. A000027, A039723, A063010, A092908, A092909.
Sequence in context: A066492 A001633 A092907 this_sequence A043314 A088472 A087019
Adjacent sequences: A051019 A051020 A051021 this_sequence A051023 A051024 A051025
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KEYWORD
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nonn,easy,base
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AUTHOR
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Eric Weisstein (eric(AT)weisstein.com)
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EXTENSIONS
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More terms and more precise definition from Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Apr 15 2004 and David Wasserman (dwasserm(AT)earthlink.net), Feb 26 2008
Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 14 2008 at the suggestion of R. J. Mathar
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