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 A050544 #24 Oct 13 2019 02:54:47 %S A050544 1,2553,4893,7897,14353,32125,51477,78973,341365 %N A050544 Numbers k such that 37*2^k-1 is prime. %H A050544 Ray Ballinger and Wilfrid Keller, <a href="http://www.prothsearch.com/riesel1.html">List of primes k.2^n + 1 for k < 300</a> %H A050544 Wilfrid Keller, <a href="http://www.prothsearch.com/riesel2.html">List of primes k.2^n - 1 for k < 300</a> %H A050544 <a href="/index/Pri#riesel">Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime</a> %H A050544 Kosmaj, <a href="http://www.15k.org/riesellist.html">Riesel list k<300</a>. %o A050544 (PARI) is(n)=ispseudoprime(37*2^n-1) \\ _Charles R Greathouse IV_, Jun 12 2017 %Y A050544 Cf. A050412, A050413. %K A050544 hard,nonn %O A050544 1,2 %A A050544 _N. J. A. Sloane_, Dec 29 1999 %E A050544 More terms from _David Broadhurst_, Dec 29 1999 %E A050544 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008