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 A088470 #28 Sep 14 2017 15:31:33
%S A088470 0,0,0,0,0,0,0,0,0,90,99,19,19,19,19,19,19,19,19,90,91,99,29,29,29,29,
%T A088470 29,29,29,90,91,92,99,39,39,39,39,39,39,90,91,92,93,99,49,49,49,49,49,
%U A088470 90,91,92,93,94,99,59,59,59,59,90,91,92,93,94,95,99,69,69,69
%N A088470 Lunar sum of distinct lunar prime divisors of n.
%C A088470 a(n) = Sum_{p is a lunar divisor of n} p. (Each prime appears at most once in this sum.)
%H A088470 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 A088470 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 A088470 D. Applegate, M. LeBrun, N. J. A. Sloane, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL14/Sloane/carry2.html">Dismal Arithmetic</a>, J. Int. Seq. 14 (2011) # 11.9.8.
%H A088470 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a>
%Y A088470 Cf. A088469, A088471, A087097.
%K A088470 nonn
%O A088470 1,10
%A A088470 _David Applegate_, Nov 11 2003