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 A216926 #14 Aug 05 2013 01:23:05 %S A216926 8855,18095,29315,31535,51359,73535,81719,117215,147455,162687,191807, %T A216926 194327,218735,265895,357599,390335,653939,760655,798215,895679, %U A216926 913031,1017359,1097459,1256759,1554119,1659119,1707839,1710863,1901735,1915199,2048255,2055095 %N A216926 Lucas-Carmichael numbers with 4 prime factors. %H A216926 Donovan Johnson, <a href="/A216926/b216926.txt">Table of n, a(n) for n = 1..1000</a> %e A216926 a(1) = 8855 = 5*7*11*23 %Y A216926 Cf. A006972 (Lucas-Carmichael numbers), A216925, A216927, A217002, A217003, A217091. %K A216926 nonn %O A216926 1,1 %A A216926 _Tim Johannes Ohrtmann_, Sep 20 2012