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 A154405 #10 Sep 08 2022 08:45:40
%S A154405 29,97,353,541,769,1693,2081,4621,8161,9857,13729,14797,17053,19469,
%T A154405 24781,26209,32321,35617,42689,48413,54497,65437,72481,77377,85021,
%U A154405 87649,95773,98561,125453,141793,148609,152077,166349,177473,185089
%N A154405 Primes of the form 20n^2+8n+1.
%H A154405 Vincenzo Librandi, <a href="/A154405/b154405.txt">Table of n, a(n) for n = 1..10000</a>
%e A154405 For n=1, a(1)=29; n=2, a(2)=97
%t A154405 Select[Table[20n^2+8n+1,{n,0,600}],PrimeQ]
%o A154405 (Magma) [a: n in [0..200] | IsPrime(a) where a is 20*n^2+8*n+1];
%Y A154405 Cf. A017293
%K A154405 nonn,easy
%O A154405 1,1
%A A154405 _Vincenzo Librandi_, Jan 09 2009
%E A154405 12701 removed, 32321 inserted, 18609 replaced by 148609 - _R. J. Mathar_, Feb 19 2009
%E A154405 Misleading formula removed - _R. J. Mathar_, Oct 18 2010