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 A050487 #15 Jul 02 2025 16:01:58 %S A050487 1,2,5,6,9,12,15,16,19,22,25,28,31,34,37,38,41,44,47,50,53,56,59,62, %T A050487 65,68,71,74,77,80,83,84,87,90,93,96,99,102,105,108,111,114,117,120, %U A050487 123,126,129,132,135,138,141,144,147,150,153,156,159,162 %N A050487 Geometric Connell sequence: start with 1; then next two numbers == 2 mod 3; next four == 3 mod 3; next eight == 1 mod 3; etc. %H A050487 R. Stephan, <a href="/somedcgf.html">Some divide-and-conquer sequences ...</a> %H A050487 R. Stephan, <a href="/A079944/a079944.ps">Table of generating functions</a> %F A050487 a(n) = 3*n - 2*(1 + floor(log_2(n))). %Y A050487 Cf. A049039, A050488. %K A050487 easy,nonn %O A050487 1,2 %A A050487 _James Sellers_, Dec 26 1999 %E A050487 More terms from _Ralf Stephan_, Oct 11 2003