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 A238852 #13 Mar 20 2014 21:04:24 %S A238852 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89, %T A238852 97,311,313,347,349,353,359,367,701,709,719,727,733,739,751,769,773, %U A238852 787,1103,1109,1123,1163,1181,1193,1301,1303,1319,1321,1327,1361,1777 %N A238852 Right-truncatable, reversible primes in base 100. %C A238852 See A238850 for definitions, and A238854 for comments on general context. %C A238852 In base 100, chosen as one of four examples, there are 1552 such numbers. %H A238852 Stanislav Sykora, <a href="/A238852/b238852.txt">Table of n, a(n) for n = 1..1552</a> %H A238852 Stanislav Sykora, <a href="https://oeis.org/wiki/File:GeneticThreads.txt">PARI/GP scripts for genetic threads</a>, with code and comments. %e A238852 The largest number of this type (using hyphens to separate the base 100 digits) is 19-07-93-27-17-37-99-47-19-11.Truncate any even number of decimal digits on its right, and the remaining prefix is still a base-100 reversible prime (e.g., 19079327 and 27930719 are both primes). %o A238852 (PARI) See the link. %Y A238852 Cf. All in base 10: A238850, 16: A238851, 256: A238853. %Y A238852 Cf. In base n: A238854 (largest), A238855 (totals), A238856 (maximum digits), A238857 (m-digit counts). %Y A238852 Cf. A007500, A023107, A024770, A237600, A237601, A237602. %K A238852 nonn,fini,full,base %O A238852 1,1 %A A238852 _Stanislav Sykora_, Mar 06 2014