login
A324047
a(n) = A000203(n) - A106316(n).
5
1, 2, 2, 6, 2, 12, 2, 13, 12, 14, 2, 24, 2, 16, 12, 29, 2, 27, 2, 26, 12, 20, 2, 48, 18, 22, 39, 56, 2, 48, 2, 60, 45, 26, 39, 76, 2, 28, 51, 80, 2, 90, 2, 72, 42, 32, 2, 112, 24, 72, 63, 80, 2, 102, 68, 88, 69, 38, 2, 120, 2, 40, 101, 124, 76, 114, 2, 96, 81, 86, 2, 183, 2, 46, 121, 104, 76, 126, 2, 130, 79, 50, 2, 196, 92, 52
OFFSET
1,2
LINKS
FORMULA
a(n) = A000203(n) - A106316(n).
PROG
(PARI)
A106315(n) = (n*numdiv(n) % sigma(n));
A106316(n) = (A106315(n) % n);
A324047(n) = (sigma(n) - A106316(n));
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Feb 13 2019
STATUS
approved