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a(n) = prime(10*n - 6).
5

%I #21 Feb 18 2024 02:07:30

%S 7,43,89,139,193,251,311,373,433,491,569,619,683,757,827,887,971,1033,

%T 1097,1181,1249,1307,1423,1481,1549,1609,1693,1759,1861,1931,2003,

%U 2083,2143,2243,2311,2383,2459,2551,2657,2707,2777,2851,2939

%N a(n) = prime(10*n - 6).

%H Ivan Panchenko, <a href="/A031914/b031914.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = A000040(A017317(n-1)). - _G. C. Greubel_, Feb 18 2024

%t Prime[10Range[50]-6] (* _Harvey P. Dale_, May 08 2011 *)

%o (Magma) [ NthPrime(10*n-6): n in [1..1000] ]; // _Vincenzo Librandi_, Apr 08 2011

%o (SageMath) [nth_prime(10*n-6) for n in range(1,61)] # _G. C. Greubel_, Feb 18 2024

%Y Cf. A000040, A017317, A031911, A031912, A031913.

%K nonn

%O 1,1

%A _Jeff Burch_