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 A169716 #30 Jul 11 2025 14:03:42 %S A169716 47,55,103,143,391,2807,11647,19223,264655 %N A169716 Numbers k such that 2^k - 127 is prime. %C A169716 Exponents k arising in A175347: see that sequence for the actual primes. %C A169716 The next term is > 10^4. [_M. F. Hasler_, Apr 18 2010] %C A169716 All terms are == 7 (mod 8). [_M. F. Hasler_, Apr 18 2010] %C A169716 No more terms through 78815. - _Charles R Greathouse IV_, Apr 19 2010 %C A169716 a(10) > 300000. - _Michael S. Branicky_, Jul 11 2025 %H A169716 Charles R Greathouse IV, <a href="https://web.archive.org/web/*/http://list.seqfan.eu/oldermail/seqfan/2010-April/004363.html">Re: A175347: Primes in A176303</a>, seqfan list, Apr 19 2010. %o A169716 (PARI) is(n)=ispseudoprime(2^n-127) \\ _Charles R Greathouse IV_, Sep 14 2015 %Y A169716 Cf. A175347, A176303. %K A169716 nonn,more %O A169716 1,1 %A A169716 _Zak Seidov_, Apr 18 2010 %E A169716 More terms from _M. F. Hasler_, Apr 18 2010 %E A169716 a(7)-a(8) from _Charles R Greathouse IV_, Apr 19 2010 %E A169716 a(9) from _Michael S. Branicky_, Jul 10 2025