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%I #15 Aug 06 2014 16:24:12
%S 2,12,22,102,112,122,202,212,222,1002,1012,1022,1102,1112,1122,1202,
%T 1212,1222,2002,2012,2022,2102,2112,2122,2202,2212,2222,10002,10012,
%U 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
%N Numbers 3n+2 written in base 3.
%C In base 3 lunar arithmetic, sum of divisors of n = n (an analog of perfect numbers).
%H D. Applegate, M. LeBrun and N. J. A. Sloane, <a href="http://arxiv.org/abs/1107.1130">Dismal Arithmetic</a> [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]
%H <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a>
%Y Cf. A016789.
%K nonn,base
%O 1,1
%A _N. J. A. Sloane_, May 15 2011