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 A205534 #11 Apr 03 2023 10:36:13 %S A205534 1,3,5,6,9,11,15,17,21,27,29,35,39,45,51 %N A205534 Record values of A205531 and A205535. %C A205534 Related to the 4.X Selfridge Conjecture by P. Underwood, cf. link. %C A205534 Records occur at [p=A205532(n), y=A205534(n)] = [2, 1], [13, 3], [61, 5], [109, 6], [1009, 9], [2689, 11], [8089, 15], [33049, 17], [53881, 21], [87481, 27], [483289, 29], [515761, 35], [1083289, 39], [3818929, 45], [9257329, 51],... %C A205534 It appears that all records > 6 occur at elements of A102295. %H A205534 P. Underwood, <a href="https://t5k.org/bios/page.php?id=181">4.X Selfridge Conjecture</a> (on "Prime Pages" profile), Jan 2012. %o A205534 (PARI) m=-1;forprime(p=1,default(primelimit),if(m+0<m=max(m,A205535(p),m), print1(m","))) %K A205534 nonn %O A205534 1,2 %A A205534 _M. F. Hasler_, Jan 28 2012