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A108568 a(n) = prime(n) + prime(n+1) - 2n - 1. 2

%I

%S 2,3,5,9,13,17,21,25,33,39,45,53,57,61,69,79,85,91,99,103,109,117,125,

%T 137,147,151,155,159,163,179,195,203,209,219,229,235,245,253,261,271,

%U 277,287,297,301,305,317,339,353,357,361,369,375,385,399,409,419,425

%N a(n) = prime(n) + prime(n+1) - 2n - 1.

%o (PARI) a(n) = prime(n) + prime(n+1) - 2*n - 1 \\ _Michel Marcus_, Jun 03 2013

%Y Cf. A108562.

%K easy,nonn

%O 1,1

%A _Giovanni Teofilatto_, Jul 05 2005

%E Extended by _Ray Chandler_, Jul 10 2005

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Last modified April 21 07:53 EDT 2019. Contains 322327 sequences. (Running on oeis4.)