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 A141410 #7 Oct 04 2015 00:02:35 %S A141410 1,1,2,5,3,7,4,3,5,11,6,13,7,1,8,17,9,19,10,7,11,23,12,25,13,9,14,29, %T A141410 15,31,16,11,17,1,18,37,19,13,20,41,21,43,22,15,23,47,24,49,25,17,26, %U A141410 53,27,11,28,19,29,59,30,61 %N A141410 Denominator of A027760(n+1)/n. %C A141410 The series of fractions A027760(n+1)/n = 2/2, 30/3, 2/4, 42/5, 2/6, 30/7, 2/8, 66/9, 2/10, ... = 1, 10, 1/2, 42/5, 1/3, 30/7, 1/4, ... for n>=2 is represented here by the reduced denominators. %F A141410 a(2n) = n. %p A141410 A141410 := proc(n) A027760(n+1)/n ; denom(%) ; end proc: %p A141410 seq(A141410(n),n=2..80) ; # _R. J. Mathar_, Jul 08 2011 %Y A141410 Cf. A141321. %K A141410 nonn,frac %O A141410 2,3 %A A141410 _Paul Curtz_, Aug 04 2008