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 A198959 #12 Jun 22 2022 11:05:48
%S A198959 2,3,7,46,2112,4460539,19896408170515,395867058087736049315365218,
%T A198959 156710727679038987453730700439845485538142584724187516
%N A198959 a(1) = 2, a(n+1) = a(n)^2 - n.
%C A198959 The next term -- a(10) -- has 107 digits. - _Harvey P. Dale_, Jun 22 2022
%H A198959 MathOverflow, <a href="http://mathoverflow.net/questions/147217/asymptotic-behavior-of-the-sequence-u-n-u-n-12-n">Asymptotic behavior of the sequence u(n) = u(n-1)^2 - n</a>
%t A198959 RecurrenceTable[{a[1]==2,a[n+1]==a[n]^2-n},a,{n,10}] (* _Harvey P. Dale_, Jun 22 2022 *)
%o A198959 (PARI) vector(10,k,t=if(k==1,2,t^2-(k-1)))
%Y A198959 Cf. A086051.
%K A198959 nonn,easy
%O A198959 1,1
%A A198959 _Franklin T. Adams-Watters_, Nov 01 2011