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 A289662 #22 Jul 05 2025 10:00:49 %S A289662 2,12,80,196,1638,4864,22425,46500,109779,158625,603564,2552416, %T A289662 2620142,2627250,41163747,237398795,1966466950,13690729828, %U A289662 64322158656,79838739611,220355987735,232268774850,618745972214,1882062476406,9607713772982,19364051829855,26393150937218,37636607806688,114514665167797,173974642809066,228013323978930,259772858868378,284600479573629,644741545246282 %N A289662 a(n) is the smallest m such that p = n-th popular prime = A385503(n) is uniquely popular on the interval [2,m] or -1 if p is never uniquely popular. %C A289662 See A385503 for further links and information. %H A289662 Nathan McNew, <a href="https://www.researchgate.net/profile/Nathan-Mcnew/publication/275363769_Popular_values_of_the_largest_prime_divisor_function/">Popular values of the largest prime divisor function</a> (corrected version), page 16, November 2015. %Y A289662 Cf. A006530, A385503, A125624, A289661-A289665. %K A289662 nonn %O A289662 1,1 %A A289662 _N. J. A. Sloane_, Jul 25 2017 %E A289662 Deleted "first" from definition. - _N. J. A. Sloane_, Oct 03 2019 %E A289662 Edited, and terms updated from revised version of McNew, by _Peter Munn_, Jul 04 2025