13564461457
domain: N
Appears in sequences
- Primes of the form sigma_4(k)/sigma_2(k), arising in A066109.at n=21A066110
- Smallest prime factor of (n^n)^2 + 1 having the form k*n+1.at n=5A208399
- Largest prime factor of 7^n + 1.at n=14A227575
- Primes of the form n^6 - n^5 + n^4 - n^3 + n^2 - n + 1.at n=17A245427
- a(n) = n^12 - n^10 + n^8 - n^6 + n^4 - n^2 + 1.at n=7A270204
- Primes of the form Phi(k, -7), where Phi is the cyclotomic polynomial.at n=9A291993
- Primes of the form Phi(k, 7), where Phi is the cyclotomic polynomial.at n=5A292011
- Smallest primitive prime factor of 7^n-1.at n=27A379640