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 A303910 #9 May 04 2018 11:49:16 %S A303910 41,148,409,998,2597,6424,15889,39970,100192,251637,637063,1617110, %T A303910 4124272,10553278,27066824,69709557,179992524,465769748,1208198402, %U A303910 3140421406,8179001739,21338685037,55762148901,145935688930,382465573384,1003652346785,2636913002779 %N A303910 Largest positive integer m with pi(m*n) = m + n, where pi(x) denotes the number of primes not exceeding x. %C A303910 a(n) >= A281197(n) >= A247600(n). %Y A303910 Cf. A247600, A281197. %K A303910 nonn %O A303910 5,1 %A A303910 _Chai Wah Wu_, May 02 2018