OFFSET
2,1
LINKS
Hugo Pfoertner and Amiram Eldar, Table of n, a(n) for n = 2..96 (terms 2..50 from Hugo Pfoertner)
Dario Alpern, Factorization using the Elliptic Curve Method.
FactorDB, Status of 509^97-1.
EXAMPLE
A000040(9)^9 - 1 = 23^9 - 1 = 1801152661462 = 2*7*11*19*79*7792003, therefore a(9) = 7792003.
MATHEMATICA
Table[FactorInteger[Prime[n]^n-1][[-1, 1]], {n, 2, 30}] (* Harvey P. Dale, May 19 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 24 2002
EXTENSIONS
More terms from Hugo Pfoertner, May 18 2004
Undefined a(1) removed by Hugo Pfoertner, Jul 22 2019
STATUS
approved