A126049 Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 9.

2, 3, 5, 7, 4, 8, 1, 4, 7, 8, 8, 1, 8, 4, 1, 7, 4, 4, 5, 4, 5, 5, 8, 2, 2, 7, 1, 5, 1, 1, 1, 2, 5, 1, 2, 2, 5, 5, 1, 1, 4, 5, 7, 2, 5, 1, 8, 5

Offset

1,1

Links

Table of n, a(n) for n=1..48.

Formula

a(n) = A010878(A000043(n)). - Ivan Panchenko, Apr 07 2018

Mathematica

Array[Mod[MersennePrimeExponent@ #, 9] &, 45] (* Michael De Vlieger, Apr 10 2018 *)

Crossrefs

Cf. A000043, A010878, A126043-A126059.

Sequence in context: A098284 A082196 A292876 * A291603 A082331 A140528

Adjacent sequences: A126046 A126047 A126048 * A126050 A126051 A126052

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