A126045 Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 5.

2, 3, 0, 2, 3, 2, 4, 1, 1, 4, 2, 2, 1, 2, 4, 3, 1, 2, 3, 3, 4, 1, 3, 2, 1, 4, 2, 3, 3, 4, 1, 4, 3, 2, 4, 1, 2, 3, 2, 1, 3, 1, 2, 2, 2, 1, 4, 1

Offset

1,1

Links

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

Formula

a(n) = A010874(A000043(n)). - Michel Marcus, Apr 07 2018

Mathematica

Array[Mod[MersennePrimeExponent@ #, 5] &, 45] (* Michael De Vlieger, Apr 07 2018 *)

Crossrefs

Cf. A000043, A010874, A126043-A126059.

Sequence in context: A171935 A103180 A308896 * A024307 A369287 A267852

Adjacent sequences: A126042 A126043 A126044 * A126046 A126047 A126048

Keyword

nonn,more

Author

Artur Jasinski, Dec 17 2006

Extensions

a(45)-a(47) from Ivan Panchenko, Apr 08 2018

a(48) from Amiram Eldar, Oct 14 2024

Status

approved