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 A171816 #23 Nov 12 2017 18:17:40 %S A171816 9,8,7,6,5,4,3,2,1,10,100,1000,10000,100000,1000000,10000000, %T A171816 100000000,1000000000,10000000000,100000000000,1000000000000, %U A171816 10000000000000,100000000000000,1000000000000000,10000000000000000,100000000000000000,1000000000000000000,10000000000000000000 %N A171816 Smallest number of rank n in the poset of lunar numbers. %C A171816 We have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing. - _N. J. A. Sloane_, Aug 06 2014 %H A171816 D. Applegate, M. LeBrun and N. J. A. Sloane, <a href="http://arxiv.org/abs/1107.1130">Dismal Arithmetic</a>, arxiv:1107.1130 (2011). %H A171816 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %Y A171816 Cf. A087061 (definition of lunar sum and product), A087062 (table of lunar product), A087097 (lunar (formerly dismal) primes). %Y A171816 Cf. A161813 (lunar poset rank of n), A144171, A144175, A171786, A171787, A171788, A171789, A171794, A171795, A171796, A191752, A191753. %K A171816 nonn,base %O A171816 0,1 %A A171816 _David Applegate_, _Marc LeBrun_ and _N. J. A. Sloane_, Oct 15 2010 %E A171816 Edited by _M. F. Hasler_, Nov 12 2017