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mu(prime(n)-1)+1.
1

%I #7 Jul 21 2017 12:53:53

%S 2,0,1,2,2,1,1,1,2,1,0,1,1,0,2,1,2,1,0,0,1,0,2,1,1,1,0,2,1,1,1,0,1,0,

%T 1,1,1,1,2,1,2,1,0,1,1,1,2,0,2,1,1,0,1,1,1,2,1,1,1,1,0,1,1,0,1,1,2,1,

%U 2,1,1,2,0,1,1,2,1,1,1,1,0,1,0,1,0,0,1,1,1,2,2,2,1,1,0,2,1,1,1,1,2,1,2,1,2

%N mu(prime(n)-1)+1.

%F a(n) = A089451(n)+1. - _R. J. Mathar_, Jul 21 2017

%K easy,nonn

%O 1,1

%A _Benoit Cloitre_, Feb 23 2002