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 A227838 #11 Apr 10 2014 00:20:29 %S A227838 0,0,1,1,0,0,2,2,0,0,1,1,0,0,3,3,0,0,1,1,0,0,1,1,0,0,4,2,0,0,1,1,0,0, %T A227838 1,1,0,0,1,1,0,0,4,2,0,0,1,1,0,0,2,5,0,0,1,1,0,0,3,2,0,0,1,1,0,0,5,2, %U A227838 0,0,1,1,0,0,2,3,0,0,1,1,0,0,3,2,0,0,1,1,0,0,2,5,0,0,1,1,0,0,6,2,0,0,3,4,0,0,1,1,0 %N A227838 2^a(n) is the highest power of 2 dividing A005132(n). %C A227838 The 2-adic valuation of Recamán's sequence A005132. %H A227838 Reinhard Zumkeller, <a href="/A227838/b227838.txt">Table of n, a(n) for n = 1..10000</a> %H A227838 <a href="/index/Rea#Recaman">Index entries for sequences related to Recamán's sequence</a> %o A227838 (Haskell) %o A227838 a227838 = a007814 . a005132 -- _Reinhard Zumkeller_, Aug 05 2013 %Y A227838 Cf. A005132, A227839, A007814. %K A227838 nonn %O A227838 1,7 %A A227838 _N. J. A. Sloane_, Aug 04 2013