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Search: id:A058186
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| A058186 |
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Numbers (written in base 5) which appear the same when written in base 5 and base 10/2. |
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+0
3
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| 0, 1, 2, 3, 4, 20, 21, 22, 23, 24, 40, 41, 42, 43, 44, 200, 201, 202, 203, 204, 220, 221, 222, 223, 224, 240, 241, 242, 243, 244, 400, 401, 402, 403, 404, 420, 421, 422, 423, 424, 440, 441, 442, 443, 444, 2000, 2001, 2002, 2003, 2004, 2020, 2021, 2022, 2023
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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To represent a number in base b, if a digit exceeds b, subtract b and carry 1. In fractional base b/c, subtract b and carry c. The sequence consists of numbers which in base 5 have digits in {0,2,4} except that the unit digit can be any from {0,1,2,3,4}.
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EXAMPLE
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20 (10 in decimal) appears since it is written as 20 both in base 5 and base 10/2. 30 (15 in decimal) does not since it is written as 30 in base 5 and 25 in base 10/2.
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CROSSREFS
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Cf. A007091, A024657, A058185.
Sequence in context: A012281 A098503 A092974 this_sequence A024632 A012578 A012573
Adjacent sequences: A058183 A058184 A058185 this_sequence A058187 A058188 A058189
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KEYWORD
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base,nonn
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), Nov 17 2000
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