Least prime p such that pi(p*n) = pi(q*n)^2 for some prime q, where pi(x) denotes the number of primes not exceeding x.

A260140

Least prime p such that pi(p*n) = pi(q*n)^2 for some prime q, where pi(x) denotes the number of primes not exceeding x.

Terms

    a(0) =2a(1) =5a(2) =19a(3) =3187a(4) =11a(5) =2251a(6) =12149a(7) =19a(8) =239a(9) =23761a(10) =61a(11) =157a(12) =8419a(13) =10973a(14) =1117a(15) =9601a(16) =58741a(17) =37a(18) =53359a(19) =14533a(20) =1063a(21) =934811a(22) =78487a(23) =27647a(24) =1249a(25) =720221a(26) =1616077a(27) =30091a(28) =5501a(29) =131627

External references