503890508623domain: NAppears in sequencesPrimes p such that there exists at least one number j and pi(p)= d_1 d_2 ... d_j*d_(j+1) d_(j+2) ... d_k where d_1 d_2 ...d_k is the decimal expansion of p.at n=13A112013Primes p such that pi(p) is the product of the first digit of p and the rest of the number.at n=5A165691