49983

Appears in sequences

• Number of ordered quadruples of integers from [ 2,n ] with no common factors between triples.at n=36A015639
• Semiprimes p such that next semiprime after p is p+20.at n=13A217335
• Take a squarefree semiprime and take the difference of its prime factors. If it is a squarefree semiprime repeat the process. Sequence lists the squarefree semiprimes that generate other squarefree semiprimes only in the first k steps of this process. Case k = 5.at n=24A296812
• Take a squarefree semiprime and take the difference of its prime factors. If it is a squarefree semiprime repeat the process. Sequence lists the squarefree semiprimes that generate other squarefree semiprimes only in the first k steps of this process. Case k = 6.at n=5A296813