%I #16 Oct 15 2024 04:30:31
%S 2,3,5,7,1,5,7,7,1,5,11,7,5,7,7,7,1,1,5,7,5,5,5,5,5,1,1,11,7,1,7,11,5,
%T 7,5,5,5,5,1,7,7,11,1,5,11,1,5,5
%N Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 12.
%F a(n) = A010881(A000043(n)). - _Ivan Panchenko_, Apr 07 2018
%t Mod[MersennePrimeExponent[Range[48]], 12] (* _Amiram Eldar_, Oct 14 2024 *)
%Y Cf. A000043, A010881, 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