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 A129673 #20 Feb 16 2025 08:33:05 %S A129673 2,3,5,17,19,23,37,41,137,139,163,167,263,293,977,1171,1847,2053,6841 %N A129673 Right truncatable primes in base 7 (written in decimal form). %C A129673 There are exactly 19 right truncatable primes in base 7. %H A129673 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 A129673 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TruncatablePrime.html">Truncatable Prime</a>. %H A129673 <a href="/index/Tri#tprime">Index entries for sequences related to truncatable primes</a> %e A129673 263 is a term because 524_7 = 263_10, 52_7 = 37_10, and 5_7 = 5_10 and 263, 37 and 5 are all prime numbers. - _Bernard Schott_, Jan 25 2019 %Y A129673 Cf. A024767, A076586. %K A129673 nonn,fini,full,base %O A129673 1,1 %A A129673 _Martin Renner_, Jun 01 2007