170085
domain: N
Appears in sequences
- Minimal value w such that A051953(w) = w - phi(w) is prime and w has n prime divisors.at n=4A051999
- Denominator of asymptotic density of Union{H_p: p is odd prime and p <= n-th prime}, where H_p is {K*p*(p-1)/2 : K integer}.at n=9A231809
- Denominator of asymptotic density of Union{H_p: p is odd prime and p <= n-th prime}, where H_p is {K*p*(p-1)/2 : K integer}.at n=10A231809
- Denominator of asymptotic density of Union{H_p: p is odd prime and p <= n-th prime}, where H_p is {K*p*(p-1)/2 : K integer}.at n=11A231809
- Denominator of asymptotic density of Union{H_p: p is odd prime and p <= n-th prime}, where H_p is {K*p*(p-1)/2 : K integer}.at n=12A231809
- Denominator of asymptotic density of Union{H_p: p is odd prime and p <= n-th prime}, where H_p is {K*p*(p-1)/2 : K integer}.at n=13A231809
- Numbers n such that cototient(n) does not divide phi(n!).at n=7A291597
- Terms of A051488 that do not belong to A083207.at n=10A333232
- Product of the smaller primes, p, in the Goldbach partitions of 2n such that p + q = 2n, p <= q, and p,q prime (or 1 if no Goldbach partition of 2n exists).at n=37A362641