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 A057698 #12 Nov 18 2019 03:22:50 %S A057698 997,1117,1459,2467,3301,3307,3607,3931,4561,4993,6373,6871,7951,8263, %T A057698 8641,9631,9643,9649,10891,10903,11953,12379,12547,15901,17047,19603, %U A057698 20089,20551,21739,21751,23671,24481,25147,28837,29599,31033,31039 %N A057698 Prime lucky numbers k (from A031157) such that nextprime(k)=nextlucky(k). %H A057698 Amiram Eldar, <a href="/A057698/b057698.txt">Table of n, a(n) for n = 1..10000</a> %Y A057698 Cf. A000959, A031157. %K A057698 easy,nonn %O A057698 1,1 %A A057698 _Naohiro Nomoto_, Oct 22 2000 %E A057698 Terms beyond a(25) via b000959.txt from _R. J. Mathar_, Oct 22 2010 %E A057698 Offset changed to 1 by _Michel Marcus_, Sep 07 2018