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 A087435 #4 Mar 30 2012 17:29:08 %S A087435 10,241,10537,573928,35547994,2409600865,174155363186,13163230391312, %T A087435 1029540512731472,82720372430619225,6791513306490769978, %U A087435 567576781128880904593,48140629936389507358024 %N A087435 Partial sums of A087434. %C A087435 Number of brilliant numbers <10^2n. %C A087435 Bisection of A086846. %Y A087435 Cf. A006879, A006880, A078972, A086846, A087434. %K A087435 nonn %O A087435 1,1 %A A087435 _Ray Chandler_, Sep 02 2003 %E A087435 a(14) from _Ray Chandler_, Jul 21 2005