OFFSET
1,1
COMMENTS
LINKS
Dario A. Alpern, Factorization using the Elliptic Curve Method.
Makoto Kamada, Factorizations of 11...11 (Repunit)
Eric Weisstein's World of Mathematics, Cyclic Number
EXAMPLE
A004042(2) = 142857 = 37*13*11*3^3, therefore a(1) = 3.
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
Reinhard Zumkeller, Jul 30 2003
EXTENSIONS
a(12)-a(42) from Ray Chandler, Nov 16 2011
a(43)-a(51) from Max Alekseyev, May 14 2022
STATUS
approved