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 A098940 #6 Aug 26 2015 21:43:26
%S A098940 -2,-1,2185,823541,170859373,27512614109,3938980639165,
%T A098940 532875860165501,70110209207109373,9098007718612700669,
%U A098940 1172544775637859048445,150599974607076225726461,19309780749956356667109373,2473765232992079297629970429
%N A098940 a(n) = (2^n - 1)^7 - 2.
%e A098940 a(2) = (2^2 - 1)^7 - 2 = 2185.
%t A098940 Table[(2^n - 1)^7 - 2, {n, 0, 15}] (* _Stefan Steinerberger_, Mar 06 2006 *)
%Y A098940 These are similar to Carol's numbers (A091515).
%K A098940 sign
%O A098940 0,1
%A A098940 _Parthasarathy Nambi_, Oct 21 2004
%E A098940 More terms from _Stefan Steinerberger_, Mar 06 2006