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 A100725 #10 Jul 08 2025 06:40:57
%S A100725 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,
%T A100725 97,101,103,107,109,113,127,131,137,139,151,157,163,167,179,191,193,
%U A100725 197,199,211,223,227,229,233,239,241,251,257,263,269,271,281,283,307,311
%N A100725 Prime numbers whose binary representations are split into a maximum of 5 runs.
%C A100725 The m-th prime is a term iff A100714(m) <= 5.
%H A100725 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Run-LengthEncoding.html">Run-Length Encoding</a>.
%e A100725 a(3)=5 is a term because it is the 3rd prime whose binary representation splits into at most 5 runs: 5_10 = 101_2.
%t A100725 Select[Table[Prime[k], {k, 1, 50000}], Length[Split[IntegerDigits[ #, 2]]] <= 5 &]
%Y A100725 Cf. A100714, A100722 (exactly 5 runs).
%K A100725 base,nonn
%O A100725 1,1
%A A100725 Joseph Biberstine (jrbibers(AT)indiana.edu), Dec 11 2004