login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A072055 a(n) = 2*prime(n)+1. 19
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

R. P. Boas & N. J. A. Sloane, Correspondence, 1974

FORMULA

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

MATHEMATICA

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

PROG

(Haskell)

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

CROSSREFS

Cf. A005385, A000040, 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.

Sequence in context: A073088 A054059 A072058 * A314300 A189320 A107448

Adjacent sequences:  A072052 A072053 A072054 * A072056 A072057 A072058

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jun 11 2002

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 23 04:16 EST 2020. Contains 331168 sequences. (Running on oeis4.)