32399

Appears in sequences

• Products of 2 successive primes.at n=40A006094
• Numbers that are the product of a pair of twin primes.at n=12A037074
• Product of twin primes of form (4*k+3,4*(k+1)+1), k>=0.at n=5A071700
• Least m which can be written as i*j+i+j in n different ways: A072670(m)=n.at n=37A072671
• Multiplicative closure of twin prime pair products (A037074).at n=28A074480
• Squarefree numbers k such that A076341(k) = 0.at n=14A076352
• a(n) = prime(2*n-1)*prime(2*n).at n=20A089581
• Numbers n such that n+1 and phi(n)+1 are both perfect squares.at n=24A089952
• Numbers k such that k+1 and sigma(k)+1 are both perfect squares.at n=16A089954
• Real part of absolute Gaussian perfect numbers, in order of increasing magnitude.at n=44A102531
• Integer part of n#/(p-3)#, where p=preceding prime to n.at n=40A102790
• Integer part of n#/(p-5)#, where p=preceding prime to n.at n=39A102791
• Numbers k such that sigma(k)-k-1 divides sigma(k+1)-k-2, where sigma(k) is sum of positive divisors of k and the ratio is greater than zero.at n=4A132585
• Numbers that are one less than a square and have exactly 4 divisors.at n=13A134020
• a(n) = 36n^2 - 1.at n=29A136017
• a(n) = (8*n+3)*(8*n+5).at n=22A177065
• Semiprimes which are sub-perfect powers.at n=21A189045
• 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=14A210503
• 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=22A229108
• G-Lehmer numbers: Composite numbers k such that A060968(k) divides A201629(k).at n=7A235864