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A143384
Duplicate of A139426.
0
1, 5, 1, 5, 11, 11, 17, 19, 23, 97, 127, 145, 167, 269, 767, 479, 3307, 1453, 18007, 2357, 599, 17669, 5527, 3191, 3251, 70249, 147773, 39637
OFFSET
1,2
COMMENTS
All primes certified using PFGW from Primeform group.
EXAMPLE
(2^2-1)*(2^2-1+1)-1=11 prime 2^2-1=M(1) so a(1)=1
(2^3-1)*(2^3-1+1)-1=55 composite
(2^3-1)*(2^3-1+3)-1=69 composite
(2^3-1)*(2^3-1+5)-1=83 prime 2^3-1=M(2) so a(2)=5
CROSSREFS
Cf. A000043 (Mersenne prime exponents), A143385.
Sequence in context: A255166 A131113 A139426 * A046611 A145825 A101692
KEYWORD
dead
AUTHOR
Pierre CAMI, Aug 11 2008
EXTENSIONS
Missing terms 2357 and 599 inserted by Jens Kruse Andersen, Jul 30 2014
STATUS
approved