97343

Appears in sequences

• Numbers that are the product of a pair of twin primes.at n=19A037074
• Product of twin primes of form (4*k+3,4*(k+1)+1), k>=0.at n=9A071700
• Squarefree numbers k such that A076341(k) = 0.at n=22A076352
• Numbers n such that n+1 and phi(n)+1 are both perfect squares.at n=37A089952
• Numbers k such that k+1 and sigma(k)+1 are both perfect squares.at n=24A089954
• Numbers that are one less than a square and have exactly 4 divisors.at n=20A134020
• a(n) = 64*n^2 - 1.at n=38A158684
• Members of A159053 which are not multiples of 3.at n=10A159054
• Semiprimes which are sub-perfect powers.at n=29A189045
• 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=22A210503
• Nonprime n not divisible by 2 or 3 such that Fibonacci(n-1) is congruent to (1 - Legendre(n,5))/2 modulo n.at n=34A220292
• 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=34A229108
• G-Lehmer numbers: Composite numbers k such that A060968(k) divides A201629(k).at n=13A235864
• 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=28A269135
• Sequence of pairwise relatively prime numbers of class P_3 (see comment).at n=32A275246
• Numbers k for which k^2 + (k')^2 is a square, where k' is the arithmetic derivative of k (A003415).at n=37A365850
• Numbers k such that k^2 + sopfr(k)^2 is a square, where sopfr = A001414.at n=22A386991