Numbers k such that sigma(k)*prime(k) is a palindrome.
A115893
Numbers k such that sigma(k)*prime(k) is a palindrome.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =4813a(4) =47619
External references
- oeis: A115893
A115893
Numbers k such that sigma(k)*prime(k) is a palindrome.