Primes p such that pi(p^2)*pi(q^2) is a square for some prime q < p, where pi(x) denotes the number of primes not exceeding x.
A262700
Primes p such that pi(p^2)*pi(q^2) is a square for some prime q < p, where pi(x) denotes the number of primes not exceeding x.
Terms
- a(0) =5a(1) =19a(2) =31a(3) =151a(4) =691a(5) =1181a(6) =1489a(7) =1511a(8) =1601a(9) =2579a(10) =3037a(11) =7297a(12) =9661a(13) =10993a(14) =11699a(15) =20407a(16) =25657a(17) =33937a(18) =65099a(19) =96419a(20) =102911a(21) =133157a(22) =251789a(23) =411841a(24) =417271a(25) =670729a(26) =808211a(27) =1179907a(28) =1671277
External references
- oeis: A262700