Composite squarefree numbers k such that k^2-1 is divisible by p-1 and p+1, where p are all the prime factors of k.

A306685

Composite squarefree numbers k such that k^2-1 is divisible by p-1 and p+1, where p are all the prime factors of k.

Terms

    a(0) =35a(1) =1189a(2) =3059a(3) =6479a(4) =8569a(5) =30889a(6) =39689a(7) =51271a(8) =84419a(9) =133399a(10) =272251a(11) =321265a(12) =430199a(13) =544159a(14) =564719a(15) =569449a(16) =585311a(17) =608399a(18) =1033241a(19) =1212751a(20) =1930499a(21) =3131029a(22) =7056721a(23) =7110179a(24) =7639919a(25) =8740601a(26) =11255201a(27) =15857855a(28) =17966519a(29) =18996769

External references