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 A235377 #25 Jan 25 2014 21:24:07
%S A235377 56,57,69,78,83,89,92,95,104,109,111,123,124,128,136,139,142,158,160,
%T A235377 171,173,176,177,178,180,185,194,200,201,203,211,214,219,222,223,228,
%U A235377 231,236,237,241,245,246,248,256,259,270,274,280,281,296,298,302,307,314
%N A235377 Positions of 10s in A235354.
%C A235377 If prime(a(n)) is written in base k>=2, and the k-representation is read in decimal, then all such numbers, for k = 2,3,...,9, are composite.
%o A235377 (PARI) isok(n) = {my(p = prime(n)); for (b = 2, 9, if (isprime(subst(Pol(digits(p, b)), x, 10)), return(0));); return (1);} \\ _Michel Marcus_, Jan 18 2014
%Y A235377 Cf. A052033, A235354, A235376, A236174, A236437.
%K A235377 nonn,base
%O A235377 1,1
%A A235377 _Vladimir Shevelev_ and _Peter J. C. Moses_, Jan 08 2014