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A175961 n-th nonprime number appears n-th nonprime numbers times. 0

%I #4 Mar 30 2012 18:52:40

%S 1,4,4,4,4,6,6,6,6,6,6,8,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9,9,10,10,10,10,

%T 10,10,10,10,10,10,12,12,12,12,12,12,12,12,12,12,12,12,14,14,14,14,14,

%U 14,14,14,14,14,14,14,14,14,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15

%N n-th nonprime number appears n-th nonprime numbers times.

%C A018252(n) appears A018252(n) times; 1 appears once, n-th composite number appears n-th composite number times; 1 together with A111655.

%F a(1)=1, a(n+1)=A111655(n).

%Y Cf. A063905, A141468, A175944.

%K nonn,easy,less

%O 1,2

%A _Juri-Stepan Gerasimov_, Oct 31 2010

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Last modified April 16 03:15 EDT 2024. Contains 371696 sequences. (Running on oeis4.)