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 A186508 #19 Aug 06 2014 17:14:12 %S A186508 9,19,90,27,90,180,819,36,90,180,738,270,738,1638,7641,45,90,180,738, %T A186508 270,819,1476,6570,360,738,1476,6732,2457,6570,14922,67968 %N A186508 Number of lunar divisors (A087029) of the decimal numbers 1, 10, 11, 100, 101, 110, 111, 1000, ... . %C A186508 This is for lunar arithmetic in base 10. %H A186508 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 A186508 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a> %e A186508 The lunar divisors of 1 are 1,2,3,4,5,6,7,8,9, so a(1)=9. %e A186508 The lunar divisors of 10 are 1...9 and 10, 20, 30, 40, ..., 90, so a(2) = 18. %Y A186508 Cf. A087029, A186443, A186510. %K A186508 base,nonn,more %O A186508 1,1 %A A186508 _N. J. A. Sloane_, Feb 22 2011