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 A228028 #24 Sep 08 2022 08:46:05
%S A228028 5,29,15629,9765629
%N A228028 Primes of the form 5^n + 4.
%H A228028 Vincenzo Librandi, <a href="/A228028/b228028.txt">Table of n, a(n) for n = 1..8</a>
%t A228028 Select[Table[5^n + 4, {n, 0, 200}], PrimeQ]
%o A228028 (Magma) [a: n in [0..200] | IsPrime(a) where a is 5^n+4];
%Y A228028 Cf. A124621 (associated n).
%Y A228028 Cf. Primes of the form k^n + h: A092506 (k=2, h=1), A057733 (k=2, h=3), A123250 (k=2, h=5), A104066 (k=2, h=7), A104070 (k=2, h=9), A057735 (k=3, h=2), A102903 (k=3, h=4), A102870 (k=3, h=8), A102907 (k=3, h=10), A290200 (k=4, h=1), A228027 (k=4, h=9), A182330 (k=5, h=2), this sequence (k=5, h=4), A228029 (k=5, h=6), A102910 (k=5, h=8), A182331 (k=6, h=1), A104118 (k=6, h=5), A104115 (k=6, h=7), A104065 (k=7, h=4), A228030 (k=7, h=6), A228031 (k=7, h=10), A228032 (k=8, h=3), A228033 (k=8, h=5), A144360 (k=8, h=7), A145440 (k=8, h=9), A228034 (k=9, h=2), A159352 (k=10, h=3), A159031 (k=10, h=7).
%K A228028 nonn
%O A228028 1,1
%A A228028 _Vincenzo Librandi_, Aug 11 2013
%E A228028 Corrected cross-references - _Robert Price_, Aug 01 2017