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 A159624 #4 Jun 02 2025 01:38:37 %S A159624 3,4,5,6,6,7,9,10,10,10,10,11,13,15,17,18,18,18,18,18,18,18,18,19,21, %T A159624 23,25,27,29,31,33,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,35, %U A159624 37,39,41,43,45,47 %N A159624 a(n)=A159619(2n)-A159615(2n). %F A159624 For n>=2, a(n)=2^k+2, if 2^k<=n<=2^k+2^(k-1)-1; a(n)=2^k+2j+3, if n=2^k+2^(k-1)+j, 0<=j<=2^(k-1)-1. %Y A159624 A159615 A159619 %K A159624 nonn %O A159624 1,1 %A A159624 _Vladimir Shevelev_, Apr 17 2009