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 A038537 #39 Aug 09 2025 05:01:10
%S A038537 2,3,379081,59771671,146752831,764479423,1479830551,3406187401,
%T A038537 5631714889,7740024337,8256310441,8772257161,9522879913,10350894331,
%U A038537 12852250993,14261996563,16082349433,16199980009,17727606151,18172964503,18294784903,19393314433,19472325391,20582035993
%N A038537 Primes base 10 that remain primes in eight bases b, 2<=b<=10, when the expansions are interpreted as decimal numbers.
%H A038537 Sebastian Petzelberger, <a href="/A038537/b038537.txt">Table of n, a(n) for n = 1..54</a> (terms up to 10^12).
%H A038537 Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_024.htm">Puzzle 24: Primes in several bases</a>, The Prime Puzzles & Problems Connection.
%t A038537 Select[Prime[Range@ 50000], Count[PrimeQ /@ Table[FromDigits[IntegerDigits[#, i]], {i, 2, 10}], True] == 8 &] (* _Michael De Vlieger_, Mar 20 2015, after _Harvey P. Dale_ at A052032 *)
%Y A038537 Cf. A052026, A038537, A052027-A052033, A084482, A236356
%K A038537 nonn,base,hard,nice
%O A038537 1,1
%A A038537 _Carlos Rivera_
%E A038537 a(4)-a(7) found by _Jack Brennen_ (see link) added by _Patrick De Geest_, Dec 15 1999
%E A038537 Terms beyond a(7) from _Sebastian Petzelberger_, Mar 21 2015