45839

Appears in sequences

• Odd numbers having no odd primes in their Collatz (3x+1) trajectory.at n=15A221475
• Expansion of Product_{k>=1} 1/(1 - x^k)^(k-phi(k)), where phi() is the Euler totient function (A000010).at n=33A307705
• Numbers with more than one Collatz tripling step whose odd Collatz trajectory does not contain primes.at n=37A319936