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 A052424 #10 Jul 20 2024 14:34:50
%S A052424 1,2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,
%T A052424 89,97,101,103,107,109,113,121,127,131,137,139,143,149,151,157,163,
%U A052424 167,169,173,179,181,187,191,193,197,199,209,211,221,223,227,229,233,239
%N A052424 Numbers k with no single-digit factors (apart from 1 and k).
%o A052424 (PARI) isok(n) = {d = divisors(n); for (i = 2, #d - 1,if (length(Str(d[i])) == 1, return (0));); return (1);} \\ _Michel Marcus_, Jul 27 2013
%Y A052424 Cf. A008364.
%K A052424 nonn,base
%O A052424 1,2
%A A052424 _Henry Bottomley_, Mar 14 2000