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A228024
Antiharmonic mean of the divisors of A228023(n) (the n-th primitive antiharmonic number).
5
1, 13, 35, 85, 119, 185, 255, 313, 455, 481, 425, 455, 629, 841, 845, 741, 1183, 841, 1355, 1015, 1547, 1105, 1445, 2197, 1799, 2735, 3315, 2405, 3523, 2873, 2755, 3605, 4165, 4595, 4607, 5705, 5525, 5365, 7111, 7995, 5915, 7157, 6165, 8285, 5525, 9373, 10933, 11305, 7813
OFFSET
1,2
COMMENTS
A228023 is the main entry for this sequence.
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = sigma_2(A228023(n))/sigma(A228023(n)).
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved