346497

Appears in sequences

• First of three consecutive Sophie Germain semiprimes: n, n+1 and n+2 are all terms of A111153.at n=11A283527
• Semiprimes k such that k+1, k+2, 2*k+1 and 2*k+3 are also semiprimes.at n=27A362200
• Numbers k such that A003415(k) == A276085(k) (mod 2310) and A003415(k+1) == A276085(k+1) (mod 2310), where A003415 is the arithmetic derivative and A276085 is the primorial base log-function.at n=11A391947