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 A201225 #18 Dec 29 2023 21:14:01
%S A201225 6100,2305180,748476100,241118603980,77641444770100,25000340035616380,
%T A201225 8050032494909496100,2592085474592828222380,834643472994047002110100,
%U A201225 268752606222334691877221980,86537504560185639786707316100,27864807715774753485364243735180
%N A201225 Values x for infinite sequence x^3-y^2 = d with decreasing coefficient r=sqrt(x)/d which tend to 1/(1350*sqrt(5))or infinity family of solutions Mordell curve with extension sqrt(5).
%C A201225 a(1) = A200656(4) = A201047(4).
%C A201225 a(2) = A200656(36) = A201047(26).
%C A201225 All points in this sequence are extremal points (definition see A200656) and from these reason is subset of A200656 and primary (definition see A200656) and from these reason is subset of A201047.
%H A201225 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (341,-6138,6138,-341,1).
%F A201225 G.f.: (20*(-305-11254*z+7424*z^2-346*z^3+z^4))/((-1+z)*(1- 322*z+z^2)*(1-18*z+z^2)).
%F A201225 a(n) = 341*a(n-1) - 6138*a(n-2) + 6138*a(n-3) - 341*a(n-4) + a(n-5).
%t A201225 LinearRecurrence[{341,-6138,6138,-341,1},{6100,2305180,748476100,241118603980,77641444770100},20] (* _Harvey P. Dale_, Aug 17 2016 *)
%Y A201225 Cf. A200216, A200656.
%K A201225 nonn
%O A201225 1,1
%A A201225 _Artur Jasinski_, Nov 28 2011