A134229 Sum of the odd composites A071904 less than or equal to 1+2*10^n.

45, 5975, 724952, 78848811, 8290599189, 857088171080, 87727442181950, 8924793000002668, 904326399306717962, 91382247906379573443, 9216035852504141985766, 928095944723211397518108, 93359489289526851301833406, 9383123076016179512328557690

Offset

1,1

Comments

A134228(n) + a(n) = A134230(n).

Links

Table of n, a(n) for n=1..14.

Formula

a(n) = sum{A071904(i): A071904(i) <= 1+2*10^n}. - R. J. Mathar, Oct 28 2007

Example

a(1)=45 because that is the sum of the odd composites (9+15+21=45) less than or equal to 21.

Crossrefs

Cf. A134228, A134230.

Sequence in context: A061542 A037182 A178632 * A364172 A209275 A199355

Adjacent sequences: A134226 A134227 A134228 * A134230 A134231 A134232

Keyword

nonn

Author

Enoch Haga, Oct 14 2007

Extensions

Better definition from R. J. Mathar, Oct 28 2007

a(9)-a(14) from Hiroaki Yamanouchi, Jul 06 2014

Status

approved