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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

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

LINKS

Table of n, a(n) for n=1..11.

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

Adjacent sequences: A290242 A290243 A290244 * A290246 A290247 A290248

KEYWORD

nonn,more

AUTHOR

Amiram Eldar, Jul 24 2017

STATUS

approved

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Last modified January 28 08:03 EST 2023. Contains 359850 sequences. (Running on oeis4.)