login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A103504 Integers that do not appear in A103502. 2
123, 1298, 4929, 9516, 10066, 14192, 15830, 15887, 17854, 20007, 23394, 24574, 27441, 31932, 33377, 33381, 33933, 35594, 35978, 37075, 40139, 40931, 41205, 43573, 45147, 47661, 47749, 48286, 48444, 48941, 50580, 51659, 52377, 59375, 61260, 61726, 62465, 63063 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For n>1873, A103502(n)>123 and for n>27763, A103502(n)>1298. - Michel Marcus, Feb 06 2014

LINKS

Hiroaki Yamanouchi, Table of n, a(n) for n = 1..3804

MATHEMATICA

Restop = Function[n, pp = Prime[Range[PrimePi[n]]]; Sum[n/pp[[k]] - Floor[n/pp[[k]]], {k, 1, Length[pp]}]]; oops = Floor[Map[Restop, Range[1, 30000]]]; Complement[Range[Max[oops]], Union[oops]]

f[n_] := Floor[Plus @@ FractionalPart[n / Table[ Prime[i], {i, PrimePi[n]}]]]; Do[ a = f[n]; If[ Position[t, a] == {}, AppendTo[t, a]], {n, 81900}]; Complement[ Range[ Sort[t][[ -1]]], t] (* Robert G. Wilson v, Feb 12 2005 *)

CROSSREFS

Cf. A103502.

Sequence in context: A174173 A116935 A265983 * A324627 A259907 A115983

Adjacent sequences:  A103501 A103502 A103503 * A103505 A103506 A103507

KEYWORD

nonn

AUTHOR

Carlos Alves, Feb 08 2005

EXTENSIONS

a(3)-a(38) from Hiroaki Yamanouchi, Sep 23 2014

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 23 04:54 EDT 2020. Contains 337295 sequences. (Running on oeis4.)