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 A034938 #29 Apr 20 2025 02:28:26 %S A034938 13,37,61,97,109,181,229,277,337,349,397,457,541,709,769,937,1009, %T A034938 1021,1117,1129,1201,1237,1297,1321,1489,1549,1597,1621,1657,1777, %U A034938 1861,2029,2221,2377,2389,2437,2521,2557,2617,2749,2857,3001,3049 %N A034938 Primes p such that (p-3)/2 is a prime of the form 6k-1. %C A034938 Related to hyperperfect numbers of a certain form (form 1, theorem 1 in "A Study of Hyperperfect Numbers"). %H A034938 Robert Price, <a href="/A034938/b034938.txt">Table of n, a(n) for n = 1..10000</a> %H A034938 J. S. McCranie, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL3/mccranie.html">A study of hyperperfect numbers</a>, J. Int. Seqs. Vol. 3 (2000) #P00.1.3. %t A034938 Select[Prime[Range[500]],Mod[(#-3)/2,6]==5&&PrimeQ[(#-3)/2]&] (* _Harvey P. Dale_, Jul 27 2019 *) %Y A034938 Cf. A038536 and A034937. %K A034938 nonn,easy %O A034938 1,1 %A A034938 _Jud McCranie_ %E A034938 Definition corrected by _Jud McCranie_, Jul 26 2019