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a(n) = prime(7*n - 5).
1

%I #11 Sep 08 2022 08:44:50

%S 3,23,53,83,113,157,193,233,271,313,359,401,443,487,541,587,619,661,

%T 719,761,821,859,911,967,1013,1051,1097,1153,1213,1259,1301,1367,1429,

%U 1471,1511,1567,1609,1663,1721,1777,1831,1879,1949,1999,2053

%N a(n) = prime(7*n - 5).

%t Prime[7*Range[50]-5] (* _Harvey P. Dale_, May 12 2014 *)

%o (Magma) [ NthPrime(7*n-5): n in [1..1000] ]; // _Vincenzo Librandi_, Apr 10 2011

%K nonn

%O 1,1

%A _Jeff Burch_