119324

Appears in sequences

• Numbers k such that 2^k - 3 is prime.at n=50A050414
• Numbers k such that s(k) = s(k+1) but phi(k) != phi(k+1), where s(k) = phi(k) + phi(phi(k)) + ... + 1 is the sum of iterated phi (A092693).at n=25A291177