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 A074774 #5 Mar 30 2012 18:39:06 %S A074774 1,47,311,138799,997057,58404025,433380445,1662803271215, %T A074774 12555303421685,762968405786159,5823841814857247,2856558096376330937, %U A074774 21966969165793217071,1355329065202645937843,10478887384420274295559 %N A074774 a(n) = A005148(n)/8^(b(n)-1) where b(n) denotes the number of 1's in the binary representation of n. %C A074774 Appears to always be an integer. 8^(b(n)-1) seems also to be the highest power of 2 dividing A005148(n) %K A074774 nonn %O A074774 1,2 %A A074774 _Benoit Cloitre_, Sep 29 2002