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 A129940 #17 Feb 16 2025 08:33:06 %S A129940 2,3,7,11,23,43,59,107,151,251,619,919,1019,3067,3691,4091 %N A129940 Left truncatable primes in base 4 (written in decimal form). %C A129940 There are 16 left truncatable primes in base 4. %H A129940 I. O. Angell and H. J. Godwin, <a href="http://dx.doi.org/10.1090/S0025-5718-1977-0427213-2">On Truncatable Primes</a>, Math. Comput. 31, 265-267, 1977. %H A129940 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TruncatablePrime.html">Truncatable Prime</a>. %H A129940 <a href="/index/Tri#tprime">Index entries for sequences related to truncatable primes</a> %Y A129940 Cf. A024779, A076623. %K A129940 nonn,fini,full,base %O A129940 1,1 %A A129940 _Martin Renner_, Jun 09 2007 %E A129940 Edited by _Franklin T. Adams-Watters_, Jan 25 2010