69312

Appears in sequences

• Numbers n such that n*sigma(n) is a perfect square.at n=19A069070
• Numbers k such that (2^k + 1)^2 - 2 = 4^k + 2^(k+1) - 1 is prime.at n=40A091513
• Expansion of elliptic_E / elliptic_K in powers of q.at n=8A261975
• Numbers k such that 3k - 1 divides 3^k - 1.at n=29A273614
• Numbers k such that phi(6k) is either phi(6k-2) or phi(6k+2), where phi is Euler's totient function A000010.at n=22A279011
• Numbers k such that phi(6k) = phi(6k-2), where phi is Euler's totient function A000010.at n=14A279183