# This b-file was computed by Antti Karttunen, 2024-11-22 # in GP/PARI CALCULATOR Version 2.9.4 (released) amd64 running linux (x86-64/GMP-6.1.2 kernel) 64-bit version, compiled: Dec 19 2017, gcc version 7.3.0 (Ubuntu 7.3.0-1ubuntu1), threading engine: pthread # with the following program: # # A023900(n) = factorback(apply(p -> 1-p, factor(n)[, 1])) # A074206(n) = if(n>1, sumdiv(n, i, if(i