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 A290426 #8 Aug 02 2017 23:40:08 %S A290426 1,3,5,7,9,15,20,21,25,27,31,35,42,45,49,53,60,63,64,75,81,86,93,97, %T A290426 100,108,110,121,126,132,140,143,154,155,159,165,176,180,187,192,198, %U A290426 209,210,211,217,222,225,233,244,255,258,265,266,277,279,288,291,294,299,310,312,320,323,324,330,334,345,356,363,367,371 %N A290426 Products of two self numbers (A003052). %e A290426 The product of the self numbers 3 and 86 is 258, so 258 is in the sequence. %Y A290426 Cf. A003052. %K A290426 nonn,base %O A290426 1,2 %A A290426 _Peter Weiss_, Jul 31 2017