A072055 a(n) = 2*prime(n)+1.

5, 7, 11, 15, 23, 27, 35, 39, 47, 59, 63, 75, 83, 87, 95, 107, 119, 123, 135, 143, 147, 159, 167, 179, 195, 203, 207, 215, 219, 227, 255, 263, 275, 279, 299, 303, 315, 327, 335, 347, 359, 363, 383, 387, 395, 399, 423, 447, 455, 459, 467, 479

Offset: 1

Author

Reinhard Zumkeller, Jun 11 2002

Keywords

• nonn

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
• R. P. Boas & N. J. A. Sloane, Correspondence, 1974

Crossrefs

Cf. A000040, A005385, A023589, A023590, A023591, A023592, A023593, A072059, A023595, A072060, A072056, A072057, A072058, A072192, A165286, A278230.

One less than A089241. After the initial term equal to A166496.

Row 4 of A286625, column 4 of A286623.

Programs

Haskell

a072055 = (+ 1) . (* 2) . a000040  -- Reinhard Zumkeller, Oct 10 2013

Mathematica

2*Prime[Range[60]]+1  (* Harvey P. Dale, Mar 31 2011 *)

Formula

a(n) = A089241(n)-1.