Numbers k such that the odd parts of k and sigma(A003961(k)) are equal, where A003961 is fully multiplicative function with a(prime(i)) = prime(i+1), and sigma is the sum of divisors function.
A374464
Numbers k such that the odd parts of k and sigma(A003961(k)) are equal, where A003961 is fully multiplicative function with a(prime(i)) = prime(i+1), and sigma is the sum of divisors function.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =6a(4) =40a(5) =120a(6) =351a(7) =702a(8) =1000a(9) =3000a(10) =14040a(11) =351000
External references
- oeis: A374464