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 A105826 a(n) = sigma(n) (mod 7). 6
 1, 3, 4, 0, 6, 5, 1, 1, 6, 4, 5, 0, 0, 3, 3, 3, 4, 4, 6, 0, 4, 1, 3, 4, 3, 0, 5, 0, 2, 2, 4, 0, 6, 5, 6, 0, 3, 4, 0, 6, 0, 5, 2, 0, 1, 2, 6, 5, 1, 2, 2, 0, 5, 1, 2, 1, 3, 6, 4, 0, 6, 5, 6, 1, 0, 4, 5, 0, 5, 4, 2, 6, 4, 2, 5, 0, 5, 0, 3, 4, 2, 0, 0, 0, 3, 6, 1, 5, 6, 3, 0, 0, 2, 4, 1, 0, 0, 3, 2, 0, 4, 6, 6, 0, 3 (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 A105826:= n-> (numtheory[sigma](n) mod 7): seq (A105826(n), n=1..105); # Jani Melik, Jan 26 2011 MATHEMATICA Mod[DivisorSigma[1, Range[110]], 7] (* Harvey P. Dale, Jul 30 2021 *) PROG (PARI) a(n)=sigma(n)%7 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: A158677 A337164 A105576 * A110665 A063441 A319600 Adjacent sequences: A105823 A105824 A105825 * A105827 A105828 A105829 KEYWORD easy,nonn AUTHOR Shyam Sunder Gupta, May 05 2005 STATUS approved

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Last modified September 17 05:28 EDT 2024. Contains 375985 sequences. (Running on oeis4.)