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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A105825 a(n) = sigma(n) (mod 5). 6
 1, 3, 4, 2, 1, 2, 3, 0, 3, 3, 2, 3, 4, 4, 4, 1, 3, 4, 0, 2, 2, 1, 4, 0, 1, 2, 0, 1, 0, 2, 2, 3, 3, 4, 3, 1, 3, 0, 1, 0, 2, 1, 4, 4, 3, 2, 3, 4, 2, 3, 2, 3, 4, 0, 2, 0, 0, 0, 0, 3, 2, 1, 4, 2, 4, 4, 3, 1, 1, 4, 2, 0, 4, 4, 4, 0, 1, 3, 0, 1, 1, 1, 4, 4, 3, 2, 0, 0, 0, 4, 2, 3, 3, 4, 0, 2, 3, 1, 1, 2, 2, 1, 4, 0, 2 (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 MAPLE A105825:= n-> (numtheory[sigma](n) mod 5): seq (A105825(n), n=1..105); # Jani Melik, Jan 26 2011 MATHEMATICA Mod[DivisorSigma[1, Range[110]], 5] (* Harvey P. Dale, Oct 03 2013 *) PROG (PARI) a(n)=sigma(n)%5 CROSSREFS Cf. A000203. 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). Sequence in context: A364871 A096392 A332964 * A238570 A145425 A201909 Adjacent sequences: A105822 A105823 A105824 * A105826 A105827 A105828 KEYWORD easy,nonn AUTHOR Shyam Sunder Gupta, May 05 2005 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.

Last modified September 9 16:40 EDT 2024. Contains 375765 sequences. (Running on oeis4.)