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A318261
a(n) is the odd part of A318262(n).
1
3, 3, 7, 5, 3, 7, 15, 5, 3, 7, 15, 31, 9, 5, 21, 3, 7, 15, 31, 63, 9, 21, 3, 7, 15, 31, 63, 127, 17, 9, 5, 21, 85, 3, 51, 7, 15, 31, 63, 127, 255, 17, 9, 73, 5, 21, 85, 3, 51, 7, 15, 31, 63, 127, 255, 511, 33, 17, 73, 5, 21, 85, 341, 11, 93, 3, 51, 7, 15, 31
OFFSET
1,1
COMMENTS
The odd part of n is the largest odd divisor of n (A000265).
LINKS
PROG
(Sage)
def A318261_list(len):
count = 0; n = 0; L = []
while count < len:
n += 2
m = power_mod(2, euler_phi(n), n)
if m.is_power_of(2):
v = 2^valuation(n, 2)
L.append(n // v)
count += 1
return L
print(A318261_list(70))
CROSSREFS
Sequence in context: A324573 A096633 A175482 * A343996 A118362 A339020
KEYWORD
nonn
AUTHOR
Peter Luschny, Sep 05 2018
STATUS
approved