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 A154962 #3 Jul 07 2016 23:54:52 %S A154962 1,1,1,1,-2,-5,-6,3,10,90,-5,-13,-14,5,30,510,-10,-21,-22,7,60,2100, %T A154962 -14,-29,-30 %N A154962 The terms of this sequence are integer values of consecutive denominators (with signs) from the fractional expansion (using only fractions with numerators to be positive 1's) of the BBP polynomial ( 4/(8*k+1) - 2/(8*k+4) - 1/(8*k+5) - 1/(8*k+6) ) for all k (starting from 0 to infinity); for k>=1 the Erdos-Straus conjecture is applied to the first fraction - so it is always replaced by exactly three fractions. %C A154962 This sequence is different from A154925, where the first fraction for k>=1 is expanded with Egyptians fractions, using R.Knott's converter calculator #1 (http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fractions/egyptian.html#calc1) %Y A154962 Cf. A073101, A075245, A075246, A075247, A154925 %K A154962 sign %O A154962 0,5 %A A154962 _Alexander R. Povolotsky_, Jan 18 2009, corrected Jan 20 2009