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Largest positive integer m with pi(m*n) = m + n, where pi(x) denotes the number of primes not exceeding x.
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%I #9 May 04 2018 11:49:16

%S 41,148,409,998,2597,6424,15889,39970,100192,251637,637063,1617110,

%T 4124272,10553278,27066824,69709557,179992524,465769748,1208198402,

%U 3140421406,8179001739,21338685037,55762148901,145935688930,382465573384,1003652346785,2636913002779

%N Largest positive integer m with pi(m*n) = m + n, where pi(x) denotes the number of primes not exceeding x.

%C a(n) >= A281197(n) >= A247600(n).

%Y Cf. A247600, A281197.

%K nonn

%O 5,1

%A _Chai Wah Wu_, May 02 2018