Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #19 Jan 14 2019 17:41:17
%S 0,0,0,0,1,0,0,0,0,3,0,0,0,0,4,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%T 2,0,0,0,0,3,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,0,0,0,2,0,0,0,
%U 0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,3,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2
%N a(n) = sigma(5*n) modulo 6.
%C a(n) = 0 if A112765(n) is even. - _Robert Israel_, Feb 27 2018
%H Robert Israel, <a href="/A097017/b097017.txt">Table of n, a(n) for n = 1..10000</a>
%F a(n) = A084301(5*n).
%p f:= n -> numtheory:-sigma(5*n) mod 6;
%p map(f, [$1.100]); # _Robert Israel_, Feb 27 2018
%t Mod[#,6]&/@DivisorSigma[1,5*Range[110]] (* _Harvey P. Dale_, Jan 14 2019 *)
%o (PARI) a(n) = sigma(5*n) % 6; \\ _Michel Marcus_, Mar 08 2014
%Y Cf. A000203, A084301, A112765.
%K nonn
%O 1,10
%A _Labos Elemer_, Aug 23 2004
%E Definition clarified by _Harvey P. Dale_, Jan 14 2019