A262044 Partial sum of the first n odd composite numbers.

9, 24, 45, 70, 97, 130, 165, 204, 249, 298, 349, 404, 461, 524, 589, 658, 733, 810, 891, 976, 1063, 1154, 1247, 1342, 1441, 1546, 1657, 1772, 1889, 2008, 2129, 2252, 2377, 2506, 2639, 2774, 2915, 3058, 3203, 3350, 3503, 3658, 3817, 3978, 4143, 4312

Offset

1,1

Comments

Intersection with A002113 gives A058850.

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Formula

a(n) = Sum_{i=1..n} A071904(i).

Maple

A262044 := proc(n)
    add(A071904(i), i=1..n) ;
end proc:

Mathematica

Accumulate[Select[Range[9, 191, 2], CompositeQ]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jun 09 2017 *)

Crossrefs

Cf. A058850.

Sequence in context: A212462 A161449 A063066 * A362420 A097658 A067725

Adjacent sequences: A262041 A262042 A262043 * A262045 A262046 A262047

Keyword

nonn,easy

Author

R. J. Mathar, Sep 09 2015

Status

approved