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 A152820 #8 Jun 02 2025 01:15:11 %S A152820 3,5,7,13,17,19,23,29,31,53,61,67,71,73,79,83,89,97,101,103,107,109, %T A152820 113,127,193,197,199,211,223,241,257,263,269,271,277,281,283,293,307, %U A152820 311,313,317,331,337,347,349,353,359,367,373,379,383,389,397,401,409,419 %N A152820 Non-upper primes (see A152754). %H A152820 Amiram Eldar, <a href="/A152820/b152820.txt">Table of n, a(n) for n = 1..10000</a> %Y A152820 Cf. A152754, A152819. %K A152820 nonn %O A152820 1,1 %A A152820 _Vladimir Shevelev_, Dec 13 2008 %E A152820 More terms from _Amiram Eldar_, Sep 12 2019