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%I #25 Oct 15 2024 03:23:13
%S 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,
%T 4,1,2,3,2,1,3,1,2,2,2,1,4,1
%N Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 5.
%F a(n) = A010874(A000043(n)). - _Michel Marcus_, Apr 07 2018
%t Array[Mod[MersennePrimeExponent@ #, 5] &, 45] (* _Michael De Vlieger_, Apr 07 2018 *)
%Y Cf. A000043, A010874, A126043-A126059.
%K nonn,more
%O 1,1
%A _Artur Jasinski_, Dec 17 2006
%E a(45)-a(47) from _Ivan Panchenko_, Apr 08 2018
%E a(48) from _Amiram Eldar_, Oct 14 2024