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 A087638 #21 Nov 15 2018 11:21:56
%S A087638 0,18,99,1638,22095,264312,3159111,36694950,418286661
%N A087638 Number of lunar primes with <= n digits.
%C A087638 Partial sums of A087636. - _M. F. Hasler_, Nov 15 2018
%H A087638 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 A087638 D. Applegate, M. LeBrun and N. J. A. Sloane, <a href="http://arxiv.org/abs/1107.1130">Dismal Arithmetic</a>, arxiv:1107.1130 [math.NT], July 2011. [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]
%H A087638 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a>
%o A087638 (PARI) A087638(n)=sum(k=2,n,A087636(k)) \\ _M. F. Hasler_, Nov 15 2018
%Y A087638 Cf. A087062 (lunar product), A087097 (lunar primes), A087636 (#{n-digit primes}).
%K A087638 nonn,base,more
%O A087638 1,2
%A A087638 Marc LeBrun and _N. J. A. Sloane_, Oct 26 2003
%E A087638 a(6)-a(9) from _David Applegate_, Nov 07 2003