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A134229 Sum of the odd composites A071904 less than or equal to 1+2*10^n. 2
45, 5975, 724952, 78848811, 8290599189, 857088171080, 87727442181950, 8924793000002668, 904326399306717962, 91382247906379573443, 9216035852504141985766, 928095944723211397518108, 93359489289526851301833406, 9383123076016179512328557690 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

LINKS

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

FORMULA

Beginning with 3, compute 10^n sums of odd composites.

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) under 10^1 (beginning with 3).

CROSSREFS

Cf. A134228, A134230.

Sequence in context: A061542 A037182 A178632 * A209275 A199355 A290819

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

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Last modified January 28 04:30 EST 2022. Contains 350654 sequences. (Running on oeis4.)