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%I #30 Aug 06 2014 17:27:00
%S 0,1,2,3,4,5,6,7,8,9,110,111,112,113,114,115,116,117,118,119,210,211,
%T 222,223,224,225,226,227,228,229,310,311,322,333,334,335,336,337,338,
%U 339,410,411,422,433,444,445,446,447,448,449,510,511,522,533,544,555,556,557,558,559,610,611,622,633,644,655,666,667,668,669,710,711,722,733
%N In lunar arithmetic, n*(n+1).
%C Not to be confused with A087027, which is the lunar product of n and (the ordinary decimal sum) n+1. Here the 1 is added to n in lunar arithmetic.
%H N. J. A. Sloane, <a href="/A181352/b181352.txt">Table of n, a(n) for n = 0..9999</a>
%H D. Applegate, <a href="/A087061/a087061.txt">C program for lunar arithmetic and number theory</a> [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]
%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. A087027.
%K nonn,base
%O 0,3
%A _David Applegate_, _Marc LeBrun_ and _N. J. A. Sloane_, Jan 27 2011