Numbers k for which A353749(k) is a multiple of A353749(sigma(k)), where A353749(k) = phi(k) * A064989(k), and A064989 shifts the prime factorization one step towards lower primes.
A353765
Numbers k for which A353749(k) is a multiple of A353749(sigma(k)), where A353749(k) = phi(k) * A064989(k), and A064989 shifts the prime factorization one step towards lower primes.
Terms
- a(0) =1a(1) =3a(2) =5a(3) =15a(4) =27a(5) =459a(6) =819a(7) =2295a(8) =13923a(9) =69615a(10) =361179a(11) =3282147a(12) =6140043a(13) =16410735a(14) =30700215a(15) =99558459a(16) =277788987a(17) =497792295a(18) =1388944935
External references
- oeis: A353765