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 A083199 #7 Mar 11 2015 11:01:43 %S A083199 0,1,0,0,3,2,1,0,0,1,0,2,1,0,0,1,0,1,0,2,1,0,0,1,0,2,1,0,1,0,5,4,3,2, %T A083199 1,0,0,1,0,7,6,5,4,3,2,1,0,1,0,0,0,0,0,2,1,0,0,1,0,1,0,0,1,0,1,0,2,1, %U A083199 0,2,1,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1,0,5,4,3,2,1,0 %N A083199 Exponent of largest power of 2 dividing A061419(n). %o A083199 (PARI) p=1; for(n=1, 100, p=p+ceil(p/2); print1(valuation(p, 2)", ")) %K A083199 nonn,easy %O A083199 1,5 %A A083199 _Ralf Stephan_, Jun 01 2003