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A290245
Number of larger members of primitive friendly pairs <= 10^n.
0
0, 1, 9, 19, 38, 66, 148, 292, 548, 966, 1688
OFFSET
1,3
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.
Sequence in context: A198590 A297396 A145958 * A039299 A211114 A159697
KEYWORD
nonn,more
AUTHOR
Amiram Eldar, Jul 24 2017
STATUS
approved