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 A238851 #12 Mar 20 2014 21:04:12 %S A238851 2,3,5,7,11,13,53,59,61,83,89,113,179,191,211,863,947,977,983,991, %T A238851 1429,1439,1823,3061,3067,3389,15161,15643,15733,15737,15739,15859, %U A238851 23029,48989,48991,251737,251831,253751,368471,4060019 %N A238851 Right-truncatable, reversible primes in base 16. %C A238851 See A238850 for definitions, and A238854 for comments on general context. %C A238851 These numbers are fully right-truncatable and reversible primes in base 16 (but listed in decimal format). They are 40 in all. %H A238851 Stanislav Sykora, <a href="https://oeis.org/wiki/File:GeneticThreads.txt">PARI/GP scripts for genetic threads</a>, with code and comments. %e A238851 The largest such number (4060019) is in hex format 0x3DF373. It is a prime, so is 0x373FD3, and 0x3DF37 has again the same properties. %o A238851 (PARI) See the link. %Y A238851 Cf. All in base 10: A238850, 100: A238852, 256: A238853. %Y A238851 Cf. In base n: A238854 (largest), A238855 (totals), A238856 (maximum digits), A238857 (m-digit counts). %Y A238851 Cf. A007500, A023107, A024770, A237600, A237601, A237602. %K A238851 nonn,fini,full,base,easy %O A238851 1,1 %A A238851 _Stanislav Sykora_, Mar 06 2014