A290245 Number of larger members of primitive friendly pairs <= 10^n.

0, 1, 9, 19, 38, 66, 148, 292, 548, 966, 1688

Offset: 1

Author

Amiram Eldar, Jul 24 2017

Keywords

• nonn
• more

Comments

a(3)-a(11) were from the paper by Pollack and Pomerance.

Links

• Paul Pollack and Carl Pomerance, Some problems of Erdős on the sum-of-divisors function, Transactions of the American Mathematical Society, Series B Vol. 3, No. 1 (2016), pp. 1-26.

Crossrefs

Cf. A233039.