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 A380388 #4 Jan 23 2025 12:39:06 %S A380388 3,5,11,13,17,19,43,67,103,131,241,257,683,2731,4099,32771,43691, %T A380388 61681,65537,65539,174763,262147,2796203,6710887,15790321 %N A380388 Primes q for which A177436(pi(q)) is not equal to 2*(1 + floor(log_2(q/(2^ceiling(log_2(q))-q)))). %H A380388 Vladimir Shevelev, <a href="https://eudml.org/doc/277854">Compact integers and factorials</a>, Acta Arithmetica 126 (2007), no. 3, 195-236. See p. 231. %Y A380388 Cf. A177436. %K A380388 nonn,more %O A380388 1,1 %A A380388 _Michel Marcus_, Jan 23 2025