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 A299109 #21 Jul 22 2022 07:28:46 %S A299109 29,139,3191,15289,350981,1681651,20344613659,2237722536169, %T A299109 5650248517599839,1464318118372209903213451940281613111, %U A299109 471219735266432821374794400248484805597413615642086220363989152195627985749609 %N A299109 Probable primes in A030221. %C A299109 From a problem in A269254. For detailed theory, see [Hone]. %C A299109 Subsequent terms have too many digits to display. %H A299109 Andrew N. W. Hone, et al., <a href="https://arxiv.org/abs/1802.01793">On a family of sequences related to Chebyshev polynomials</a>, arXiv:1802.01793 [math.NT], 2018. %F A299109 a(n) = A030221(A299101(n)). %Y A299109 Positions of primes in A030221, A294099 (row 5). %Y A299109 Cf. A285992, A299107, A299109, A088165, A117522, A299100, A299101, A113501, A269253, A269254, A298675, A298677, A298878, A299045, A299071. %K A299109 nonn,hard,more %O A299109 1,1 %A A299109 _L. Edson Jeffery_, _Bob Selcoe_ and _Andrew Hone_, Feb 02 2018