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 A062788 #23 Apr 17 2024 16:06:57 %S A062788 1,361,116281,37442161,12056259601,3882078149401,1250017107847561, %T A062788 402501626648765281,129604273763794572961,41732173650315203728201, %U A062788 13437630311127731805907801,4326875228009479326298583761,1393240385788741215336338063281 %N A062788 Squares of the form 5n*(n-1)+1. %H A062788 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (323,-323,1). %F A062788 a(n) = A049683(2*n-1) = (1/16) * (Lucas(12*n-6) - 2). - _Joerg Arndt_, Apr 09 2023 %F A062788 From _Chai Wah Wu_, Apr 17 2024: (Start) %F A062788 a(n) = 323*a(n-1) - 323*a(n-2) + a(n-3) for n > 3. %F A062788 G.f.: x*(-x^2 - 38*x - 1)/((x - 1)*(x^2 - 322*x + 1)). (End) %o A062788 (PARI) for(n=1,10^8,x=(5*n*(n-1)+1); if(issquare(x),print(x))) %Y A062788 Bisection of A049683. %Y A062788 Cf. A062786. %K A062788 nonn,easy %O A062788 1,2 %A A062788 _Jason Earls_, Jul 19 2001 %E A062788 More terms from _Sean A. Irvine_, Apr 08 2023