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A336693
Period of binary representation of 1/(1+sigma(n)).
7
1, 1, 4, 1, 3, 12, 6, 1, 3, 18, 12, 28, 4, 20, 20, 1, 18, 4, 6, 14, 10, 36, 20, 60, 1, 14, 20, 18, 5, 9, 10, 1, 21, 20, 21, 11, 12, 60, 18, 12, 14, 48, 12, 8, 39, 9, 21, 100, 28, 23, 9, 30, 20, 110, 9, 110, 54, 12, 60, 156, 6, 48, 12, 1, 8, 28, 22, 7, 48, 28, 9, 21, 20, 44, 100, 46, 48, 156, 54, 40, 60, 7, 8, 60
OFFSET
1,3
FORMULA
a(n) = A007733(1+A000203(n)) = A007733(A088580(n)) = A007733(A332459(n)).
PROG
(PARI)
A007733(n) = znorder(Mod(2, n/2^valuation(n, 2))); \\ From A007733
A336693(n) = A007733(1+sigma(n));
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jul 31 2020
STATUS
approved