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A227986 Antiharmonic mean of the divisors of A227771(n) (the n-th antiharmonic number that is not a square). 3
13, 35, 85, 91, 119, 185, 255, 245, 255, 313, 455, 481, 425, 455, 629, 559, 841, 845, 741, 765, 1183, 841, 793, 1355, 1015, 833, 935, 1295, 1547, 1105, 1443, 1505, 1445, 2197, 1785, 1799, 2735, 2041, 3315, 2405, 2135, 2523, 3523, 2873, 2755, 3605, 2191, 4165 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For comments, references, example, and crossrefs, see A227771.

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = sigma_2(A227771(n))/sigma_1(A227771(n)).

CROSSREFS

Cf. A227771, A176797.

Sequence in context: A082214 A115161 A063300 * A228024 A243383 A242578

Adjacent sequences:  A227983 A227984 A227985 * A227987 A227988 A227989

KEYWORD

nonn

AUTHOR

Jonathan Sondow, Aug 02 2013

STATUS

approved

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Last modified May 24 14:12 EDT 2022. Contains 354037 sequences. (Running on oeis4.)