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 A242947 #12 Jun 12 2014 13:18:44 %S A242947 1,2,3,2,5,1,7,2,3,2,11,3,13,2,1,2,17,1,19,2,1,2,23,1,5,2,3,2,29,1,31, %T A242947 2,3,2,1,3,37,2,1,2,41,1,43,2,5,2,47,1,7,2,3,2,53,1,1,2,3,2,59,3,61,2 %N A242947 a(n) = n / A242926(n-1). %C A242947 a(n) = n: A008578. %C A242947 a(2n) = 2, 2, 1, 2, 2, 3, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 3,... . %C A242947 A242926 is the denominator of a super autosequence based on 1/n. See A189731 and A242563. %e A242947 a(1)=1/1, a(2)=2/1=2, a(3)=3/1=3, a(4)=4/2=2, a(5)=5/1=5, a(6)=6/6=1, a(7)=7/1=7, a(8)=8/4=2, ... . %Y A242947 Cf. A242926, A008578, A189731, A242563. %K A242947 nonn %O A242947 1,2 %A A242947 _Paul Curtz_, May 27 2014 %E A242947 Edited by _N. J. A. Sloane_, Jun 12 2014