A126048 Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 8.

2, 3, 5, 7, 5, 1, 3, 7, 5, 1, 3, 7, 1, 7, 7, 3, 1, 1, 5, 7, 1, 5, 5, 1, 5, 1, 1, 3, 7, 1, 3, 7, 1, 3, 5, 5, 1, 1, 5, 3, 7, 7, 1, 1, 3, 1, 1

Offset

1,1

Links

Table of n, a(n) for n=1..47.

Formula

a(n) = A010877(A000043(n)). - Ivan Panchenko, Apr 07 2018

Mathematica

Mod[MersennePrimeExponent[Range[47]], 8] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 18 2019 *)

Crossrefs

Cf. A126043-A126059.

Sequence in context: A182949 A245711 A246258 * A142349 A234316 A284630

Adjacent sequences: A126045 A126046 A126047 * A126049 A126050 A126051

Keyword

nonn

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

Status

approved