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 A262540 #3 Oct 04 2015 20:46:54 %S A262540 1,9,-99,-7038,-113643,1547469,112734378,1884830229,-26299018683, %T A262540 -1956243650733,-33464928293199,452674080810576,34841458485708282, %U A262540 611295716269145124,-7738654169519261871,-626134798894169029653,-11321201939484706804827,129953731916611548222291 %N A262540 Bisection of A262539. %Y A262540 Cf. A262539, A262541. %K A262540 sign %O A262540 0,2 %A A262540 _N. J. A. Sloane_, Oct 04 2015