A179860 Integer averages of first n noncomposites for some n.

1, 2, 6, 636, 1592, 2574, 292656, 917042, 1108972, 1678508, 3334890730, 3981285760, 28567166356, 32739591796, 83332116034, 871263881618, 1055495274756

Offset: 1

Author

Ray Chandler, Jul 29 2010

Keywords

• nonn
• more

Comments

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

Examples

			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.

Formula

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

Extensions

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