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A126050
Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 10.
0
2, 3, 5, 7, 3, 7, 9, 1, 1, 9, 7, 7, 1, 7, 9, 3, 1, 7, 3, 3, 9, 1, 3, 7, 1, 9, 7, 3, 3, 9, 1, 9, 3, 7, 9, 1, 7, 3, 7, 1, 3, 1, 7, 7, 7, 1, 9, 1
OFFSET
1,1
FORMULA
a(n) = A010879(A000043(n)). - Ivan Panchenko, Apr 07 2018
MATHEMATICA
Array[Mod[MersennePrimeExponent@ #, 10] &, 45] (* Michael De Vlieger, Apr 10 2018 *)
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Artur Jasinski, Dec 17 2006
EXTENSIONS
a(45)-a(46) from Ivan Panchenko, Apr 07 2018
a(47) from Ivan Panchenko, Apr 09 2018
a(48) from Amiram Eldar, Oct 14 2024
STATUS
approved