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 A057190 #17 Jan 06 2025 13:34:29 %S A057190 7,11,19,2207,2477,4951,821497 %N A057190 Numbers k such that (24^k+1)/25 is a prime. %C A057190 a(7) > 10^5. - _Robert Price_, Jun 04 2013 %H A057190 H. Dubner and T. Granlund, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL3/DUBNER/dubner.html">Primes of the Form (b^n+1)/(b+1)</a>, J. Integer Sequences, 3 (2000), #P00.2.7. %H A057190 H. Lifchitz, <a href="http://www.primenumbers.net/Henri/us/MersFermus.htm">Mersenne and Fermat primes field</a> %o A057190 (PARI) isok(n) = (denominator(p=(24^n+1)/25)==1) && isprime(p); \\ _Michel Marcus_, Oct 30 2017 %K A057190 nonn,more %O A057190 1,1 %A A057190 _N. J. A. Sloane_, Sep 15 2000 %E A057190 a(7) from _Paul Bourdelais_, Jan 06 2025