A060264 First prime after 2n.

2, 3, 5, 7, 11, 11, 13, 17, 17, 19, 23, 23, 29, 29, 29, 31, 37, 37, 37, 41, 41, 43, 47, 47, 53, 53, 53, 59, 59, 59, 61, 67, 67, 67, 71, 71, 73, 79, 79, 79, 83, 83, 89, 89, 89, 97, 97, 97, 97, 101, 101, 103, 107, 107, 109, 113, 113, 127, 127, 127, 127, 127, 127, 127, 131

Offset

0,1

Comments

Conjecture: for n > 2, this is the least prime p such that 1^2, 2^2, 3^2, ..., n^2 are distinct mod p. Checked to 10^4. - Charles R Greathouse IV, Dec 03 2022

Links

Harry J. Smith, Table of n, a(n) for n = 0..1000

Formula

a(n) = A151800(2*n). - Reinhard Zumkeller, Nov 15 2013

Maple

A060264 := proc(n)
        nextprime(2*n) ;
end proc:

Mathematica

Table[NextPrime[2n], {n, 0, 100}] (* Vladimir Joseph Stephan Orlovsky, Mar 03 2011 *)

Prog

(PARI) a(n) = nextprime(2*n + 1)  \\ Harry J. Smith, Jul 03 2009
(Haskell)
a060264 = a151800 . (* 2)  -- Reinhard Zumkeller, Nov 15 2013

Crossrefs

Cf. A020482, A049653, A059786, A060308, A088633, A151800.

Cf. A005843.

Sequence in context: A046220 A141792 A180458 * A219429 A256457 A104192

Adjacent sequences: A060261 A060262 A060263 * A060265 A060266 A060267

Keyword

nonn,easy,changed

Author

Labos Elemer, Mar 23 2001

Status

approved