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A179860 Integer averages of first n noncomposites for some n. 2
1, 2, 6, 636, 1592, 2574, 292656, 917042, 1108972, 1678508, 3334890730, 3981285760, 28567166356, 32739591796, 83332116034, 871263881618, 1055495274756 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A variant of A050248 (primes), A073263 (composites) and A160758 (nonprimes).

LINKS

Table of n, a(n) for n=1..17.

FORMULA

a(n) = A179861(n) / A179859(n) = A014284(A179859(n)) / A179859(n).

EXAMPLE

Sum of first 7 noncomposites is 42; 42 / 7 = 6 is in the sequence.

CROSSREFS

Cf. A008578 (noncomposites), A014284 (sum of first n noncomposites).

Cf. A179859, A179861, A158682.

Sequence in context: A132495 A112724 A110795 * A067107 A180492 A169661

Adjacent sequences:  A179857 A179858 A179859 * A179861 A179862 A179863

KEYWORD

nonn,more

AUTHOR

Ray Chandler, Jul 29 2010

EXTENSIONS

a(16)-a(17) from Robert Price, Apr 21 2013

STATUS

approved

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Last modified July 23 14:51 EDT 2019. Contains 325255 sequences. (Running on oeis4.)