193441

Properties

Appears in sequences

• Primes of the form 2*p^2 - 1, where p is prime.at n=24A092057
• Number of permutations of length n that avoid the patterns 132, 4321.at n=40A116701
• a(n) = 128*n^2 + 2528*n + 12481.at n=28A157436
• Primes of the form 2*p^k-1, where p is prime and k > 1.at n=37A178491
• Prime k with sigma(sigma(sigma(k))) < 3*k + 1.at n=35A320517
• Primes p such that p == 1 (mod A001414(p-1)) and p == 1 (mod A001414(p+1)).at n=20A339181
• Prime numbersat n=17450