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 A379345 #7 Dec 22 2024 15:56:14 %S A379345 1,5,13,29,49,83,130,202,297,423,591,799,1061,1404,1837,2344,2978, %T A379345 3777,4753,5899,7338,9036,11118,13489,16223 %N A379345 Number of integers of the form k^2 - 1 whose greatest prime factor is at most prime(n). %C A379345 See A181471 and A223701 for additional information. %H A379345 Florian Luca and Filip Najman, <a href="https://arxiv.org/abs/1005.1533">On the largest prime factor of x^2-1</a>, arXiv:1005.1533 [math.NT], 2010. %H A379345 Florian Luca and Filip Najman, <a href="https://doi.org/10.1090/S0025-5718-2010-02381-6">On the largest prime factor of x^2-1</a>, Mathematics of Computation 80 (2011), 429-435. (Paper has errata that was posted on the MOC website.) %Y A379345 Partial sums of A181471. %Y A379345 Cf. A175607, A223701, A379344. %K A379345 nonn,more %O A379345 1,2 %A A379345 _Andrew Howroyd_, Dec 22 2024