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 A027758 #16 Sep 01 2025 16:23:44
%S A027758 11,29,191,281,389,659,821,1901,2459,3089,5861,6329,7841,11351,14051,
%T A027758 14771,19469,21179,22961,23879,30809,36299,42239,43481,44741,55469,
%U A027758 56891,64271,67349,72101,73721,90911,96419,137279,139511
%N A027758 Primes of the form k^2 + k + 9.
%H A027758 Harvey P. Dale, <a href="/A027758/b027758.txt">Table of n, a(n) for n = 1..1000</a>
%H A027758 P. De Geest, <a href="https://www.worldofnumbers.com/index.html">World!Of Numbers</a>
%t A027758 Select[Table[k^2+k+9,{k,400}],PrimeQ] (* _Harvey P. Dale_, Sep 01 2025 *)
%o A027758 (Magma) [ a: k in [0..450] | IsPrime(a) where a is k^2+k+9 ]; // _Vincenzo Librandi_, Dec 29 2010
%K A027758 nonn,changed
%O A027758 1,1
%A A027758 _Patrick De Geest_