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A328936
The number of imprimitive Carmichael numbers (A328935) below 10^n.
0
4, 11, 25, 63, 134, 268, 508, 1013, 1901, 3773, 7208, 13834, 26353, 50343, 96122, 184354, 354218
OFFSET
6,1
COMMENTS
Granville and Pomerance conjectured that most Carmichael numbers are primitive, i.e. lim_{n->oo} a(n)/A055553(n) = 0.
EXAMPLE
a(6) = 4 since there are 4 imprimitive Carmichael numbers below 10^6: 294409, 399001, 488881, 512461.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Amiram Eldar, Oct 31 2019
EXTENSIONS
a(20)-a(22) calculated using data from Claude Goutier and added by Amiram Eldar, Apr 22 2024
STATUS
approved