login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A084301 a(n) = sigma(n) mod 6. 25
1, 3, 4, 1, 0, 0, 2, 3, 1, 0, 0, 4, 2, 0, 0, 1, 0, 3, 2, 0, 2, 0, 0, 0, 1, 0, 4, 2, 0, 0, 2, 3, 0, 0, 0, 1, 2, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 4, 3, 3, 0, 2, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 2, 1, 0, 0, 2, 0, 0, 0, 0, 3, 2, 0, 4, 2, 0, 0, 2, 0, 1, 0, 0, 2, 0, 0, 0, 0, 0, 0, 4, 0, 2, 0, 0, 0, 2, 3, 0, 1, 0, 0, 2, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..16384

Index entries for sequences related to sums of divisors

FORMULA

a(n) = A010875(A000203(n)). - Antti Karttunen, Nov 07 2017

MAPLE

A084301:= n-> (numtheory[sigma](n) mod 6):

seq (A084301(n), n=1..105); # Jani Melik, Jan 26 2011

MATHEMATICA

Table[Mod[DivisorSigma[1, n], 6], {n, 120}] (* Harvey P. Dale, Apr 07 2011 *)

PROG

(PARI) a(n)=sigma(n)%6 \\ Charles R Greathouse IV, Mar 09 2014

CROSSREFS

Cf. A000203, A010875, A054763, A084299, A084300.

Sequences sigma(n) mod k: A053866 (k=2), A074941 (k=3), A105824 (k=4), A105825 (k=5), A084301 (k=6), A105826 (k=7), A105827 (k=8).

Cf. A074627 (locations of 0), A074628 (locations of 2), A067051 (locations of 3), A074630 (locations of 4), A074384 (locations of 5).

Sequence in context: A102222 A171657 A287696 * A195788 A201930 A176979

Adjacent sequences: A084298 A084299 A084300 * A084302 A084303 A084304

KEYWORD

easy,nonn

AUTHOR

Labos Elemer, Jun 02 2003

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 5 19:04 EST 2022. Contains 358588 sequences. (Running on oeis4.)