72091

Properties

Appears in sequences

• Primes of the form p^2 - p - 1, where p is prime.at n=20A091568
• Numbers k such that A003313(k) = A003313(5*k).at n=22A116460
• Primes of the form p^k - p^(k-1) - 1, with p prime and k>1.at n=33A122395
• a(n) is the smallest number k such that k^n has the same digits as some other n-th power without leading zeros.at n=17A133208
• Centered 18-gonal (or octadecagonal) primes.at n=34A264825
• Primes p such that A001175(p) = (p-1)/9.at n=36A308794
• Primes p such that A001177(p) = (p-1)/9.at n=22A308802
• Prime numbersat n=7137