This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A181352 #30 Aug 06 2014 17:27:00 %S A181352 0,1,2,3,4,5,6,7,8,9,110,111,112,113,114,115,116,117,118,119,210,211, %T A181352 222,223,224,225,226,227,228,229,310,311,322,333,334,335,336,337,338, %U A181352 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 A181352 In lunar arithmetic, n*(n+1). %C A181352 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 A181352 N. J. A. Sloane, <a href="/A181352/b181352.txt">Table of n, a(n) for n = 0..9999</a> %H A181352 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 A181352 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 A181352 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %Y A181352 Cf. A087027. %K A181352 nonn,base %O A181352 0,3 %A A181352 _David Applegate_, _Marc LeBrun_ and _N. J. A. Sloane_, Jan 27 2011