Numbers whose sum of divisors and sum of anti-divisors are both palindromes.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =208a(6) =211a(7) =489a(8) =39765a(9) =41689a(10) =43545a(11) =45772a(12) =1226372a(13) =2028209a(14) =3131006a(15) =5639781a(16) =45224913a(17) =402664481a(18) =509561899a(19) =534611505a(20) =30392347941a(21) =37824872279a(22) =42100531202a(23) =67332408085a(24) =208185050013a(25) =363340615629