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 A378928 #14 Dec 21 2024 15:22:30 %S A378928 4,120,350,1116,64700,1304511,3523884,9559575,189961956,189964332, %T A378928 514275185,514275546,1394194200,3779851131,75370121712,204475052375, %U A378928 204475052625,204475053625,204475054125,204475054750 %N A378928 Numbers k such that pi(k) = rad(k), where pi = A000720, rad = A007947. %C A378928 a(21) > 10^12. %e A378928 a(1) = 4 because the first solution of pi(x) = rad(x) is 4 since pi(4) = rad(4) = 2. %Y A378928 Cf. A000720 (pi), A007947 (rad). %K A378928 nonn,more %O A378928 1,1 %A A378928 _Toshitaka Suzuki_, Dec 11 2024