A052147 a(n) = prime(n) + 2.

4, 5, 7, 9, 13, 15, 19, 21, 25, 31, 33, 39, 43, 45, 49, 55, 61, 63, 69, 73, 75, 81, 85, 91, 99, 103, 105, 109, 111, 115, 129, 133, 139, 141, 151, 153, 159, 165, 169, 175, 181, 183, 193, 195, 199, 201, 213, 225, 229, 231, 235, 241, 243, 253, 259

Offset

1,1

Comments

A048974, A052147, A067187 and A088685 are very similar after dropping terms less than 13. - Eric W. Weisstein, Oct 10 2003

A117530(n,2) = a(n) for n>1. - Reinhard Zumkeller, Mar 26 2006

a(n) = A000040(n) + 2 = A008864(n) + 1 = A113395(n) - 1 = A175221(n) - 2 = A175222(n) - 3 = A139049(n) - 4 = A175223(n) - 5 = A175224(n) - 6 = A140353(n) - 7 = A175225(n) - 8. - Jaroslav Krizek, Mar 06 2010

Left edge of the triangle in A065342. - Reinhard Zumkeller, Jan 30 2012

Union of A006512 and A107986. - David James Sycamore, Jul 08 2018

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Maple

seq(ithprime(n)+2, n=1..55); # Muniru A Asiru, Jul 08 2018

Mathematica

Prime[Range[70]]+2 (* Vladimir Joseph Stephan Orlovsky, Apr 29 2008 *)

Prog

(Magma) [p+2: p in PrimesUpTo(400)]; // Vincenzo Librandi, Nov 27 2013
(Haskell)
a052147 = (+ 2) . a000040  -- Reinhard Zumkeller, Jul 03 2015
(PARI) a(n)=prime(n)+2 \\ Charles R Greathouse IV, Jan 19 2017
(Sage) [nth_prime(n) +2 for n in (1..70)] # G. C. Greubel, May 20 2019
(GAP) Filtered([1..300], k-> IsPrime(k) ) +2 # G. C. Greubel, May 20 2019

Crossrefs

A139690 is a subsequence.

Cf. A040976, A000040.

Sequence in context: A239276 A284132 A263427 * A139690 A283559 A284190

Adjacent sequences: A052144 A052145 A052146 * A052148 A052149 A052150

Keyword

nonn,easy

Author

Simon Colton (simonco(AT)cs.york.ac.uk), Jan 24 2000

Status

approved