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Search: id:A140268
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| A140268 |
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a(n) = negative integer -n presented in balanced ternary system. |
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+0
3
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| 2, 21, 20, 22, 211, 210, 212, 201, 200, 202, 221, 220, 222, 2111, 2110, 2112, 2101, 2100, 2102, 2121, 2120, 2122, 2011, 2010, 2012, 2001, 2000, 2002, 2021, 2020, 2022, 2211, 2210, 2212, 2201, 2200, 2202, 2221, 2220, 2222, 21111, 21110, 21112
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Sequence A117968 in ternary. (See there for more references.)
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EXAMPLE
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For example a(2) = 21, as -2 = -1*3 + 1*1. Similarly, a(19) = 2102, as -19 = -1*27 + 1*9 + 0*3 + -1*1.
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CROSSREFS
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a(n) = A007089(A117968(n)). Cf. A140267.
Sequence in context: A077208 A084313 A074769 this_sequence A106422 A077678 A037309
Adjacent sequences: A140265 A140266 A140267 this_sequence A140269 A140270 A140271
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KEYWORD
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nonn,base
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AUTHOR
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Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), May 19 2008, prompted by Eric Angelini's (eric.angelini(AT)skynet.be) posting on SeqFan mailing list on Sep 15 2005.
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