# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a329039 Showing 1-1 of 1 %I A329039 #10 Nov 07 2019 14:39:18 %S A329039 0,0,0,2,0,0,0,8,3,0,0,6,0,0,0,24,0,6,0,10,0,0,0,24,5,0,18,14,0,0,0, %T A329039 64,0,0,0,30,0,0,0,40,0,0,0,22,15,0,0,72,7,10,0,26,0,36,0,56,0,0,0,30, %U A329039 0,0,21,160,0,0,0,34,0,0,0,96,0,0,15,38,0,0,0,120,81,0,0,42,0,0,0,88,0,30,0,46,0,0,0,192,0,14,33,70,0,0,0,104,0 %N A329039 If n = Product p_i^e_i, a(n) = n * Sum ((e_i - 1)/p_i). %H A329039 Antti Karttunen, Table of n, a(n) for n = 1..65537 %F A329039 a(n) = A003415(n) - A069359(n). %o A329039 (PARI) A329039(n) = if(n<=1, 0, my(f=factor(n)); n*sum(i=1, #f~, ((f[i, 2]-1)/f[i, 1]))); %Y A329039 Cf. A003415, A069359. %Y A329039 Cf. A005117 (positions of zeros). %K A329039 nonn %O A329039 1,4 %A A329039 _Antti Karttunen_, Nov 07 2019 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE