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 A159010 #1 Jun 01 2010 03:00:00
%S A159010 2,16,48,1280,640,279552,93184,87326720,196485120,1289117040640,
%T A159010 257823408128,37368456004239360,6228076000706560,
%U A159010 458287510968422367232,982044666360905072640,563650690404417328113516544
%N A159010 Denominator of the integral of x^n times the Cantor function, from 0 to 1.
%F A159010 I(n) = 1/(2*(n+1)) + 1/(2*3^(n+1)-1) * sum_{i=0}{n-1} (n choose i) 2^(n-i) I(i)
%e A159010 I(0) is obviously 1/2 by symmetry.
%Y A159010 A159009 gives the corresponding numerators. A095844/A095845 give the integrals of powers of the Cantor function itself.
%K A159010 frac,nonn
%O A159010 0,1
%A A159010 Simon Tatham (anakin(AT)pobox.com), Apr 02 2009