A072473 - OEIS

%I #23 Sep 08 2022 08:45:06

%S 1,4,8,12,18,24,26,34,38,42,48,52,60,64,66,78,80,90,96,102,108,114,

%T 116,134,132,138,148,156,162,168,166,180,180,198,200,208,216,220,230,

%U 236,242,252,252,264,266,280,280,280,294,312,324,330,336,342,344,350,350

%N a(n) = prime(2*n) - prime(n).

%C a(n) > prime(n) for n > 1. - _Charles R Greathouse IV_, Nov 22 2013

%C Sequence is not monotonic. - _Zak Seidov_, Feb 15 2015

%H Seiichi Manyama, <a href="/A072473/b072473.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = A066066(n) + A000040(n). - _Reinhard Zumkeller_, Jul 25 2010

%t Table[ Prime[2n] - Prime[n], {n, 1, 60}]

%o (PARI) a(n) = prime(2*n) - prime(n); \\ _Michel Marcus_, Nov 22 2013

%o (Magma) [NthPrime(2*n) - NthPrime(n): n in [1..80]]; // _Vincenzo Librandi_, Feb 16 2015

%Y Cf. A072715.

%K nonn

%O 1,2

%A _Amarnath Murthy_, Jun 20 2002

%E Edited by _Robert G. Wilson v_ and _Jim Nastos_, Jun 21 2002