Numbers k such that phi(k) equals the product of two numbers: sums of prime factors of k, with and without repetition.
A237798
Numbers k such that phi(k) equals the product of two numbers: sums of prime factors of k, with and without repetition.
Terms
- a(0) =750a(1) =5022a(2) =8037a(3) =18250a(4) =60249a(5) =105669a(6) =1760490a(7) =1965270a(8) =4626489a(9) =62546070a(10) =202631245a(11) =441416073a(12) =286952692809
External references
- oeis: A237798