A105827 a(n) = sigma(n) (mod 8).

1, 3, 4, 7, 6, 4, 0, 7, 5, 2, 4, 4, 6, 0, 0, 7, 2, 7, 4, 2, 0, 4, 0, 4, 7, 2, 0, 0, 6, 0, 0, 7, 0, 6, 0, 3, 6, 4, 0, 2, 2, 0, 4, 4, 6, 0, 0, 4, 1, 5, 0, 2, 6, 0, 0, 0, 0, 2, 4, 0, 6, 0, 0, 7, 4, 0, 4, 6, 0, 0, 0, 3, 2, 2, 4, 4, 0, 0, 0, 2, 1, 6, 4, 0, 4, 4, 0, 4, 2, 2, 0, 0, 0, 0, 0, 4, 2, 3, 4, 1, 6, 0, 0, 2, 0

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

A105827:= (n-> numtheory[sigma](n) mod 8):
seq (A105827(n), n=1..105); # Jani Melik, Jan 26 2011

Prog

(PARI) a(n)=sigma(n)%8

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), A105852 (k=9), A105853 (k=10).

Sequence in context: A067342 A348987 A322656 * A230289 A367502 A023888

Adjacent sequences: A105824 A105825 A105826 * A105828 A105829 A105830

Keyword

easy,nonn

Author

Shyam Sunder Gupta, May 05 2005

Status

approved