Odd numbers k for which A003958(sigma(k)) = A003958(k), where A003958 is multiplicative with a(p^e) = (p-1)^e and sigma is the sum of divisors function.
A351443
Odd numbers k for which A003958(sigma(k)) = A003958(k), where A003958 is multiplicative with a(p^e) = (p-1)^e and sigma is the sum of divisors function.
Terms
- a(0) =1a(1) =49a(2) =40905a(3) =106353a(4) =140211a(5) =275301a(6) =302697a(7) =499041a(8) =597213a(9) =1094913a(10) =1284417a(11) =1578933a(12) =2004345a(13) =2266137a(14) =2560653a(15) =3247857a(16) =3444201a(17) =3738717a(18) =4425921a(19) =5014953a(20) =5123817a(21) =5211297a(22) =5407641a(23) =5505813a(24) =5996673a(25) =6193017a(26) =6870339a(27) =7174737a(28) =8156457a(29) =8941833
External references
- oeis: A351443