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 A217371 #35 Jan 06 2017 16:00:06 %S A217371 3,7,19,5,11,17,5,13,31,5,11,53,7,23,31,7,19,43,5,17,83,5,7,11,23,7, %T A217371 23,79,5,7,11,47,5,41,101,11,23,83,11,31,67,5,11,13,41,5,7,17,53,11, %U A217371 59,71,7,11,23,29,19,29,109,11,23,251,11,41,149,5,7,11,191,23,47,71 %N A217371 Array read by rows in which row n lists the prime factors of the n-th Lucas-Carmichael number. %H A217371 Jason Kimberley, <a href="/A217371/b217371.txt">Rows i = 1..1000 of irregular triangle, flattened</a> %H A217371 John Smith, <a href="http://planetmath.org/LucasCarmichaelNumber.html">Lucas-Carmichael number</a>, PlanetMath.org %H A217371 Wikipedia, <a href="http://en.wikipedia.org/wiki/Lucas-Carmichael_number">Lucas-Carmichael number</a> %H A217371 <a href="/index/Ca#Carmichael">Index entries for sequences related to Carmichael numbers.</a> %F A217371 The n-th row is the A006972(n)-th row of A027746. - _Jason Kimberley_, Nov 04 2012 %e A217371 Array begins: %e A217371 3, 7, 19, %e A217371 5, 11, 17, %e A217371 5, 13, 31, %e A217371 5, 11, 53, %e A217371 7, 23, 31, %e A217371 7, 19, 43, %e A217371 5, 17, 83, %e A217371 5, 7, 11, 23. %Y A217371 Cf. A006972, A027746. %K A217371 nonn,easy,tabf %O A217371 1,1 %A A217371 _Gerasimov Sergey_, Oct 01 2012