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 A144930 #23 Dec 31 2023 11:35:24
%S A144930 1,109,11989,1318681,145042921,15953402629,1754729246269,
%T A144930 193004263686961,21228714276319441,2334965566131451549,
%U A144930 256824983560183350949,28248413226054037152841,3107068629882383903461561,341749300873836175343618869,37589316027492096903894614029
%N A144930 Numbers k arising in A144929.
%C A144930 Numbers n such that there exists x in N : (x+1)^3 - x^3 = 7*n^2. - _Richard Choulet_, Oct 16 2008
%D A144930 E.-A. Majol, Note #2228, L'Intermédiaire des Mathématiciens, 9 (1902), pp. 183-185. - _N. J. A. Sloane_, Mar 03 2022
%H A144930 Colin Barker, <a href="/A144930/b144930.txt">Table of n, a(n) for n = 1..450</a>
%H A144930 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (110,-1).
%F A144930 a(n+2) = 110*a(n+1)-a(n). - _Richard Choulet_, Oct 16 2008
%F A144930 G.f.: -x*(x-1) / (x^2-110*x+1). - _Colin Barker_, Oct 17 2014
%e A144930 a(1) = 1 because 2^3-1^3 = 7*1. - _Richard Choulet_, Oct 16 2008
%t A144930 LinearRecurrence[{110,-1},{1,109},20] (* _Harvey P. Dale_, Oct 05 2016 *)
%o A144930 (PARI) Vec(-x*(x-1)/(x^2-110*x+1) + O(x^20)) \\ _Colin Barker_, Jul 14 2016
%Y A144930 Cf. A144729, A144727.
%K A144930 easy,nonn
%O A144930 1,2
%A A144930 _Richard Choulet_, Sep 25 2008
%E A144930 More terms from _Colin Barker_, Oct 17 2014