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 A046341 #12 Apr 08 2021 20:06:51 %S A046341 8,44,66,99,171,212,222,242,252,272,282,292,333,343,363,404,434,464, %T A046341 474,494,555,575,595,606,616,646,656,696,747,777,828,848,888,909,969, %U A046341 1001,1221,1331,1551,1771,2222,2552,2882,3333,3553,4004,4224,4334,4554 %N A046341 Composite palindromes with an odd number of prime factors (counted with multiplicity). %H A046341 John Cerkan, <a href="/A046341/b046341.txt">Table of n, a(n) for n = 1..10000</a> %Y A046341 Cf. A046339, A046340. %K A046341 nonn,base %O A046341 1,1 %A A046341 _Patrick De Geest_, Jun 15 1998 %E A046341 Title corrected by _Sean A. Irvine_, Apr 08 2021