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 A046402 #14 Aug 14 2024 13:12:19
%S A046402 210,330,462,770,1155,3030,3930,4242,4530,5430,5502,5730,6342,6666,
%T A046402 7070,7602,8022,8646,9170,9390,9966,10570,10590,10605,11110,11190,
%U A046402 11490,11946,12606,12670,13146,13370,13755,14410,14826,15554,15666,15855,16086,16610,16665
%N A046402 Numbers with exactly 4 distinct palindromic prime factors.
%H A046402 Andrew Howroyd, <a href="/A046402/b046402.txt">Table of n, a(n) for n = 1..1000</a>
%t A046402 Take[Times@@@Module[{nn=300,pp},pp=Select[Prime[Range[nn]],PalindromeQ];Subsets[pp,{4}]]//Union,40] (* _Harvey P. Dale_, Aug 13 2024 *)
%Y A046402 Intersection of A033620 and A046386.
%Y A046402 Cf. A046370.
%K A046402 nonn,base
%O A046402 1,1
%A A046402 _Patrick De Geest_, Jun 15 1998
%E A046402 Offset changed and a(37) onwards from _Andrew Howroyd_, Aug 14 2024