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A031340 a(n) = prime(7*n). 1

%I #22 Sep 08 2022 08:44:50

%S 17,43,73,107,149,181,227,263,307,349,389,433,467,521,571,613,653,701,

%T 751,809,853,887,947,997,1039,1091,1129,1193,1237,1291,1327,1423,1453,

%U 1493,1553,1601,1637,1699,1753,1811,1873,1931,1993

%N a(n) = prime(7*n).

%H Jens Kruse Andersen, <a href="/A031340/b031340.txt">Table of n, a(n) for n = 1..10000</a>

%p ithprime(7*n)

%t Prime[7*Range[50]] (* _Harvey P. Dale_, Nov 24 2011 *)

%o (Magma) [NthPrime(7*n): n in [1..50]]; // _Vincenzo Librandi_, Apr 10 2011

%o (Sage) [nth_prime(7*n) for n in (1..50)] # _Bruno Berselli_, May 07 2014

%o (PARI) a(n)=prime(7*n) \\ _Edward Jiang_, Sep 08 2014

%Y Cf. similar sequences listed in A031336.

%K nonn,easy

%O 1,1

%A _Jeff Burch_

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)