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 A129069 #13 Mar 24 2023 03:02:41 %S A129069 7,9,13,17,25,29,37,41,49,61,65,77,85,89,97,109,121,125,137,145,149, %T A129069 161,169,181,197,205,209,217,221,229,257,265,277,281,301,305,317,329, %U A129069 337,349,361,365,385,389,397,401,425,449,457,461,469,481,485,505,517,529 %N A129069 Numbers k such that (k-3)/2 is prime. %F A129069 a(n) = 2*prime(n) + 3. - _Zak Seidov_, May 12 2007 %e A129069 For n=7, (7-3)/2 = 2 which is prime so 7 is the first entry. %t A129069 Select[Range[550],PrimeQ[(#-3)/2]&] (* _Harvey P. Dale_, Feb 09 2011 *) %o A129069 (PARI) g(m) = forprime(p=2,m,n=2*p+3;print1(n",")) %Y A129069 Cf. A000040. %K A129069 easy,nonn %O A129069 1,1 %A A129069 _Cino Hilliard_, May 11 2007, May 17 2007