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 A190642 Numbers 3n+2 written in base 3. 0
 2, 12, 22, 102, 112, 122, 202, 212, 222, 1002, 1012, 1022, 1102, 1112, 1122, 1202, 1212, 1222, 2002, 2012, 2022, 2102, 2112, 2122, 2202, 2212, 2222, 10002, 10012, 10022, 10102, 10112, 10122, 10202, 10212, 10222, 11002, 11012, 11022, 11102, 11112, 11122, 11202, 11212, 11222, 12002, 12012, 12022, 12102, 12112, 12122, 12202, 12212, 12222, 20002, 20012, 20022, 20102, 20112, 20122, 20202, 20212, 20222, 21002, 21012, 21022, 21102, 21112, 21122, 21202, 21212, 21222, 22002, 22012, 22022, 22102, 22112, 22122, 22202, 22212, 22222 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS In base 3 lunar arithmetic, sum of divisors of n = n (an analog of perfect numbers). LINKS D. Applegate, M. LeBrun and N. J. A. Sloane, Dismal Arithmetic [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing] CROSSREFS Cf. A016789. Sequence in context: A244188 A189330 A120672 * A108960 A111095 A073211 Adjacent sequences: A190639 A190640 A190641 * A190643 A190644 A190645 KEYWORD nonn,base AUTHOR N. J. A. Sloane, May 15 2011 STATUS approved

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Last modified November 27 01:14 EST 2022. Contains 358362 sequences. (Running on oeis4.)