Intersection of A137409 and A339870: Composite numbers k of the form 4u+1 having more than one prime factor of type 4u+3, and for which the odd part of phi(k) divides k-1.
A339875
Intersection of A137409 and A339870: Composite numbers k of the form 4u+1 having more than one prime factor of type 4u+3, and for which the odd part of phi(k) divides k-1.
Terms
- a(0) =561a(1) =6601a(2) =8481a(3) =17733a(4) =23001a(5) =30889a(6) =54741a(7) =62745a(8) =88561a(9) =106141a(10) =319965a(11) =359601a(12) =449065a(13) =534061a(14) =609301a(15) =949785a(16) =1357621a(17) =2162721a(18) =2288661a(19) =2615977a(20) =3284281a(21) =4005001a(22) =4698001a(23) =4830805a(24) =5381265a(25) =6313681a(26) =6594721a(27) =6840001a(28) =8093701a(29) =11782005
External references
- oeis: A339875