This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A031342 #20 Sep 08 2022 08:44:50 %S A031342 23,61,103,151,197,251,307,359,419,463,523,593,643,701,761,827,883, %T A031342 953,1019,1069,1129,1213,1279,1321,1427,1481,1543,1601,1663,1733,1801, %U A031342 1877,1951,2017,2087,2143,2239,2297,2371,2423,2521,2593 %N A031342 a(n) = prime(9*n). %H A031342 Jens Kruse Andersen, <a href="/A031342/b031342.txt">Table of n, a(n) for n = 1..10000</a> %p A031342 ithprime(9*n) %t A031342 Prime[9*Range[50]] (* _Harvey P. Dale_, Mar 17 2022 *) %o A031342 (Magma) [NthPrime(9*n): n in [1..50]]; // _Vincenzo Librandi_, Apr 08 2011 %o A031342 (Sage) [nth_prime(9*n) for n in (1..50)] # _Bruno Berselli_, May 07 2014 %o A031342 (PARI) a(n)=prime(9*n) \\ _Edward Jiang_, Sep 08 2014 %Y A031342 Cf. similar sequences listed in A031336. %K A031342 nonn %O A031342 1,1 %A A031342 _Jeff Burch_