Palindromes for which both the numerator (A017665) and the denominator (A017666) of sigma(n)/n are palindromes, where sigma is the sum of divisors (A000203).
A240466
Palindromes for which both the numerator (A017665) and the denominator (A017666) of sigma(n)/n are palindromes, where sigma is the sum of divisors (A000203).
Terms
- a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =333a(8) =17571a(9) =40004a(10) =93939a(11) =569965a(12) =1787871a(13) =2316132a(14) =541626145a(15) =17575757571
External references
- oeis: A240466