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 A046333 #8 Apr 12 2017 03:12:24 %S A046333 27872,27972,29592,42224,57375,63336,63536,65056,67176,80208,80608, %T A046333 80808,82128,82728,83538,84048,84348,86768,88088,88288,232232,238832, %U A046333 259952,279972,401104,409904,414414,420024,424424,441144,443344,444444 %N A046333 Palindromes with exactly 7 prime factors (counted with multiplicity). %H A046333 John Cerkan, <a href="/A046333/b046333.txt">Table of n, a(n) for n = 1..10000</a> %Y A046333 Cf. A046308, A046320. %K A046333 nonn,base %O A046333 1,1 %A A046333 _Patrick De Geest_, Jun 15 1998