259374246011
domain: N
Appears in sequences
- a(n) = n*11^n + 1.at n=10A064749
- Smallest prime obtained as the concatenation of a power of n followed by a 1, or 0 if no such number exists.at n=10A088622
- Smallest prime of the form an n-th power followed by digit 1.at n=9A089318
- a(n) = 10*11^n+1.at n=10A199764
- Generalized Cullen primes: any primes that can be written in the form n*b^n + 1 with n+2 > b > 2.at n=5A210339
- a(n) = Sum_{d|n} phi(d^d), where phi(n) is the Euler totient function A000010(n).at n=10A226459
- a(n) = Sum_{d|n} phi(d^n), where phi() is the Euler totient function (A000010).at n=10A321349
- a(n) = (1/n) * Sum_{k=1..n} n^(n/gcd(n, k)).at n=10A332621