A179861 a(n) is the sum of the first A179859(n) noncomposites.

1, 6, 42, 143100, 775304, 1891890, 14646554832, 130985694070, 188757015148, 419047914740, 1055777525624570390, 1492138298614167680, 70288308055831268412, 91779857115464381780, 571686203669195590338, 56978071532766214007450, 83023388015844408083484

Offset

1,2

Comments

A variant of A050247 (primes), A073262 (composites) and A164280 (nonprimes).

Links

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

Formula

a(n) = A014284(A179859(n)) = A179859(n) * A179860(n).

Example

A179859(3) = 7; sum of first 7 noncomposites is 42, so a(3) = 42.

Crossrefs

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

Cf. A050247, A073262, A164280, A179859, A179860.

Sequence in context: A139223 A291192 A185222 * A083940 A101071 A299375

Adjacent sequences: A179858 A179859 A179860 * A179862 A179863 A179864

Keyword

nonn

Author

Ray Chandler, Jul 29 2010

Extensions

a(16)-a(17) from Amiram Eldar, May 24 2024

Status

approved