# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a359603 Showing 1-1 of 1 %I A359603 #11 Jan 11 2023 20:59:58 %S A359603 1,-4,-7,-21,-19,30,-11,51,-132,-164,-91,-11,-51,-588,-935,-5904,-451, %T A359603 -1402,-251,-5979,-7347,-13898,-2251,-25507,-12140,-27718,-99060, %U A359603 -174307,-11251,11610,-15,52653,685,2410,-1095,24800,-71,-198,-2647,53673,-631,61020,-351,94173,-20052,-21368,-3151,207838 %N A359603 Dirichlet inverse of function f(n) = 1+(A003415(n)*A276086(n)), where A003415 is the arithmetic derivative and A276086 is the primorial base exp-function. %H A359603 Antti Karttunen, Table of n, a(n) for n = 1..11550 %H A359603 Index entries for sequences related to primorial base %F A359603 a(1) = 1, and for n > 1, a(n) = -Sum_{d|n, d