57599

Appears in sequences

• Numbers that are the product of a pair of twin primes.at n=16A037074
• Denominators of continued fraction convergents to sqrt(959).at n=6A042857
• Product of twin primes of form (4*k+3,4*(k+1)+1), k>=0.at n=8A071700
• Multiplicative closure of twin prime pair products (A037074).at n=36A074480
• Squarefree numbers k such that A076341(k) = 0.at n=18A076352
• Brilliant numbers such that when they are concatenated with their 10's complement, which also must be brilliant, the result is a prime.at n=6A084629
• Numbers n such that n+1 and phi(n)+1 are both perfect squares.at n=32A089952
• Numbers k such that k+1 and sigma(k)+1 are both perfect squares.at n=20A089954
• Integer part of n#/(p-3)#, where p=preceding prime to n.at n=51A102790
• Products of two successive primes that can be partitioned in sum of three distinct primes which contain the prime divisors.at n=15A109068
• Numbers that are one less than a square and have exactly 4 divisors.at n=17A134020
• a(n) = 64*n^2 - 1.at n=29A158684
• Semiprimes which are sub-perfect powers.at n=26A189045
• Numbers k that form a primitive Pythagorean triple with k' and sqrt(k^2 + k'^2), where k' is the arithmetic derivative of k.at n=19A210503
• Increasing a(n)is the smallest number of the form p^a*q^b, where a,b are positive integers and p < q are odd primes such that max( p^a, q^b)/min( p^a, q^b) <= 1 + 2/prime(n).at n=28A229108
• G-Lehmer numbers: Composite numbers k such that A060968(k) divides A201629(k).at n=11A235864
• Quasi-Carmichael numbers to exactly three bases.at n=20A257753
• Numbers n which are neither a prime nor a square of a prime such that there is no d, 2<=d<=n/2, which divides binomial(n-d-1,d-1) and is not coprime to n.at n=25A269135
• Sequence of pairwise relatively prime numbers of class P_3 (see comment).at n=26A275246
• Euler elliptic Carmichael numbers for the elliptic curve y^2 = x^3 + 80.at n=20A290338