OFFSET
1,1
COMMENTS
For a given n, for all k, k^n mod a(n) will always be either 0, 1 or a(n)-1. This will not be true for numbers larger than a(n).
It appears that a(m) = 4 for m in A045979. - Michel Marcus, Sep 04 2020
EXAMPLE
For n = 5 all fifth powers of natural numbers: 1,32,243,1024, etc. are either a multiple of 11, or 1 greater or 1 less than a multiple of 11. There is no greater number than 11 for which all fifth powers are at most 1 different from a multiple. So a(5) = 11.
CROSSREFS
KEYWORD
nonn
AUTHOR
Elliott Line, Sep 02 2020
EXTENSIONS
More terms from Michel Marcus, Sep 04 2020
STATUS
approved