A173072 n-th prime minus n-th even number.

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, 51, 53, 53, 55, 67, 69, 73, 73, 81, 81, 85, 89, 91, 95, 99, 99, 107, 107, 109, 109, 119, 129, 131, 131, 133, 137, 137, 145, 149, 153, 157, 157, 161, 163, 163, 171, 183, 185

Offset: 1

Author

Juri-Stepan Gerasimov, Feb 09 2010

Keywords

• nonn
• easy

Crossrefs

See A179437 for another version.

Programs

Mathematica

Table[Prime[n]-2(n-1),{n,70}] (* Harvey P. Dale, Jul 04 2016 *)

Formula

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

Extensions

Edited by Charles R Greathouse IV, Mar 24 2010