A173073 - OEIS

%I #3 Mar 30 2012 18:52:39

%S 0,0,2,3,4,4,4,5,6,6,6,7,8,8,8,9,9,9,9,9,10,11,11,11,11,11,12,12,12,

%T 13,14,14,14,15,15,15,15,15,16,16,16,16,16,17,18,18,18,18,18,19,19,19,

%U 20,21,21,21,21,21,22,22,22,23,23,23,23,23,24,24,24,24,24,24,24,25,25,25

%N (n-th nonnegative nonprime) minus (n-1).

%C Zero together with (natural nonprimes minus n).

%F a(n)=A141468(n)-A001477(n-1). [corrected _R. J. Mathar_, Apr 25 2010]

%Y Cf. A001477, A073425, A141468.

%K nonn

%O 1,3

%A _Juri-Stepan Gerasimov_, Feb 09 2010

%E Formula index corrected by _R. J. Mathar_, Apr 24 2010