OFFSET
1,2
COMMENTS
a(66) > 40000. - Robert Price, Mar 02 2015
LINKS
Henri Lifchitz & Renaud Lifchitz: PRP Records. Probable Primes Top 10000.
FORMULA
A128472(n) = (2n-1)^a(n) - 2 for n > 1.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexander Adamchuk, Oct 01 2007
EXTENSIONS
a(6) = 22420 was found by Rick L. Shepherd, Sep 29 2009
a(21)-a(44) from Max Alekseyev, Oct 04 2007
a(45)-a(65) from Robert Price, Mar 02 2015
STATUS
approved