Numbers for which the root mean square of nontrivial divisors is an integer and which are not a square of prime numbers.
A247137
Numbers for which the root mean square of nontrivial divisors is an integer and which are not a square of prime numbers.
Terms
- a(0) =119a(1) =161a(2) =343a(3) =369a(4) =527a(5) =711a(6) =721a(7) =833a(8) =959a(9) =1081a(10) =1127a(11) =1241a(12) =1695a(13) =1767a(14) =2047a(15) =3281a(16) =3335a(17) =3553a(18) =3713a(19) =4207a(20) =4633a(21) =4681a(22) =5047a(23) =5215a(24) =6713a(25) =6887a(26) =7327a(27) =7775a(28) =9641a(29) =12319
External references
- oeis: A247137