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 A350979 #16 Mar 08 2022 13:25:57 %S A350979 1,652,165985,42159916,10708453057,2719904916940,690845140450081, %T A350979 175471945769404012,44569183380288169345,11320397106647425609996, %U A350979 2875336295905065816770017,730324098762780070033974700,185499445749450232722812804161,47116128896261596331524418282572,11967311240204696017974479430969505 %N A350979 a(0)=1, a(1)=652, thereafter a(n) = 254*a(n-1)-a(n-2)+378. %C A350979 Arises in studying the equation x^3 - 7*y^2 = 1. %D A350979 P.-F. Teilhet, Query 2228, L'Intermédiaire des Mathématiciens, 11 (1904), 44-45. %H A350979 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (255,-255,1). %F A350979 From _Chai Wah Wu_, Mar 07 2022: (Start) %F A350979 a(n) = 255*a(n-1) - 255*a(n-2) + a(n-3) for n > 3. %F A350979 G.f.: x*(20*x^2 - 397*x - 1)/((x - 1)*(x^2 - 254*x + 1)). (End) %Y A350979 Cf. A144929, A350980, A350981, A350982. %K A350979 nonn %O A350979 0,2 %A A350979 _N. J. A. Sloane_, Mar 06 2022