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 A100011 #23 Dec 22 2024 10:35:25 %S A100011 2,600,16858418928600, %T A100011 10540904502382779165253193559218987587063928137089696600 %N A100011 a(n+1) = a(n)*((261*a(n)^3)-(504*a(n)^2)+(283*a(n))-38)/2 for n > 0, a(0) = 2. %C A100011 The next term (a(4)) has 223 digits and a(5) has 891 digits. - _Harvey P. Dale_, Dec 22 2024 %t A100011 NestList[# (261 #^3 - 504 #^2 + 283 # - 38)/2 &, 2, 5] (* _Harvey P. Dale_, Dec 22 2024 *) %Y A100011 Cf. A092183, A007501, A099179, A000332. %K A100011 easy,nonn %O A100011 0,1 %A A100011 _Jonathan Vos Post_, Nov 16 2004