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 = 7.
A296814
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 = 7.
Terms
- a(0) =28738a(1) =137042a(2) =373763a(3) =384767a(4) =662426a(5) =686627a(6) =775595a(7) =888227a(8) =896498a(9) =919115a(10) =1216311a(11) =1599578a(12) =2022119a(13) =2027195a(14) =2218978a(15) =2234018a(16) =2276543a(17) =2307491a(18) =2375522a(19) =2625351a(20) =2920067a(21) =3202863a(22) =3329891a(23) =3457887a(24) =3568151a(25) =3904634a(26) =3917882a(27) =4359491a(28) =4468634a(29) =4710863
External references
- oeis: A296814