23771

Appears in sequences

• Numerators of continued fraction convergents to sqrt(132).at n=4A041240
• Numbers n such that 8*10^n + 5*R_n - 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=13A103084
• Composite numbers n such that n | A072514 (n).at n=14A237878
• Numbers k such that (16*10^k + 197) / 3 is prime.at n=22A280205
• Odd composite integers m such that A004187(m-J(m,45)) == 0 (mod m) and gcd(m,45)=1, where J(m,45) is the Jacobi symbol.at n=40A340099