a(n) is the sum of all numbers k such that the greatest prime factor of k^2 - 1 is prime(n).
A379344
a(n) is the sum of all numbers k such that the greatest prime factor of k^2 - 1 is prime(n).
Terms
- a(0) =3a(1) =31a(2) =310a(3) =15055a(4) =30433a(5) =318914a(6) =1378856a(7) =41139929a(8) =29628346a(9) =706390476a(10) =5330866189a(11) =17573061167a(12) =227644494516a(13) =912323845104
External references
- oeis: A379344