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

A303910

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

Terms

    a(0) =41a(1) =148a(2) =409a(3) =998a(4) =2597a(5) =6424a(6) =15889a(7) =39970a(8) =100192a(9) =251637a(10) =637063a(11) =1617110a(12) =4124272a(13) =10553278a(14) =27066824a(15) =69709557a(16) =179992524a(17) =465769748a(18) =1208198402a(19) =3140421406a(20) =8179001739a(21) =21338685037a(22) =55762148901a(23) =145935688930a(24) =382465573384

External references