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n-th prime minus n-th even number.
1

%I #8 Jul 04 2016 12:53:11

%S 2,1,1,1,3,3,5,5,7,11,11,15,17,17,19,23,27,27,31,33,33,37,39,43,49,51,

%T 51,53,53,55,67,69,73,73,81,81,85,89,91,95,99,99,107,107,109,109,119,

%U 129,131,131,133,137,137,145,149,153,157,157,161,163,163,171,183,185

%N n-th prime minus n-th even number.

%F a(n)=A000040(n) - 2n + 2.

%t Table[Prime[n]-2(n-1),{n,70}] (* _Harvey P. Dale_, Jul 04 2016 *)

%Y See A179437 for another version.

%K nonn,easy

%O 1,1

%A _Juri-Stepan Gerasimov_, Feb 09 2010

%E Edited by _Charles R Greathouse IV_, Mar 24 2010