90901

Properties

Appears in sequences

• Denominators of continued fraction convergents to sqrt(228).at n=4A041425
• Denominators of continued fraction convergents to sqrt(912).at n=4A042763
• a(n) is the least index such that the least primitive root of the a(n)-th prime is n, or zero if no such prime exists.at n=60A066529
• Least k such that the least positive primitive root of prime(k) equals prime(n).at n=17A079060
• Numbers n such that there exists x in N : (x+1)^3-x^3=19*n^2.at n=2A145123
• Smallest n-digit number m such that phi(10^n+1)=phi(m), gcd(10^n+1,m)=1 and 10 does not divide m, or zero if there is no such m.at n=4A147547
• Primes having only {0, 1, 9} as digits.at n=37A199329
• Primes formed by concatenating k, k, and 1 for k >= 1.at n=23A210511
• Prime(n), where n is such that (1+sum_{i=1..n} prime(i)) / n is an integer.at n=14A233523
• Centered 18-gonal (or octadecagonal) primes.at n=36A264825
• Primes of the form b*10^(2*k) + b*10^k + 1 for 1 <= b <= 9, k >= 0.at n=13A309739
• Prime numbersat n=8793