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 A062668 #16 Sep 08 2022 08:45:03
%S A062668 39,93,309,339,393,403,713,933,939,993,1137,1293,1317,1329,1333,1339,
%T A062668 1369,1389,1643,1703,1839,1893,2263,2319,2369,2573,3013,3029,3039,
%U A062668 3071,3093,3099,3107,3117,3139,3151,3189,3193,3197,3279,3309,3369,3419,3459
%N A062668 Composite and every divisor (except 1) contains the digit 3.
%H A062668 Amiram Eldar, <a href="/A062668/b062668.txt">Table of n, a(n) for n = 1..10000</a>
%e A062668 93 has divisors 1, 3, 31 and 93, all of which contain the digit 3.
%t A062668 fQ[n_, dgt_] := Union[ MemberQ[#, dgt] & /@ IntegerDigits@ Rest@ Divisors@ n][[1]]; Select[ Range[2, 3460], !PrimeQ[#] && fQ[#, 3] &] (* _Robert G. Wilson v_, Jun 11 2014 *)
%o A062668 (Magma) [k:k in [2..3500]| forall{d:d in Set(Divisors(k)) diff {1}| 3 in Intseq(d)}]; // _Marius A. Burtea_, Nov 07 2019
%Y A062668 Cf. A062653, A062664, A062667, A062669, A062670, A062671, A062672, A062673, A062674, A062675, A062676, A062677, A062678, A062679, A062680.
%K A062668 base,easy,nonn
%O A062668 1,1
%A A062668 _Erich Friedman_, Jul 04 2001
%E A062668 Offset corrected by _Amiram Eldar_, Nov 07 2019