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 A098939 #11 Aug 26 2015 23:24:51
%S A098939 -2,-1,177145,1977326741,8649755859373,25408476896404829,
%T A098939 62050608388552823485,138624799340320978519421,
%U A098939 296443535898840969287109373,620340165367069806017523226109,1284197945649659948122178573052925
%N A098939 a(n) = (2^n - 1)^11 - 2.
%e A098939 a(2) = (2^2 - 1)^11 - 2 = 177145.
%t A098939 Table[(2^n - 1)^11 - 2, {n, 0, 10}] (* _Stefan Steinerberger_, Mar 06 2006 *)
%t A098939 (2^Range[0,10]-1)^11-2 (* _Harvey P. Dale_, Apr 29 2014 *)
%o A098939 (PARI) first(m)=vector(m,i,i--;(2^i - 1)^11 - 2) \\ _Anders Hellström_, Aug 26 2015
%Y A098939 These are similar to Carol's numbers (A091515).
%K A098939 sign
%O A098939 0,1
%A A098939 _Parthasarathy Nambi_, Oct 21 2004
%E A098939 More terms from _Stefan Steinerberger_, Mar 06 2006