271607

Appears in sequences

• a(n) is the n-th J_11-prime (Josephus_11 prime).at n=10A163791
• Number x such that usigma(x) = (-1)sigma(x), where usigma(x) is the sum of unitary divisors of x (A034448) and (-1)sigma(x) is defined in A049060 .at n=12A258101