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 A248547 #18 May 21 2025 20:51:47 %S A248547 0,12,28,53,65,504,1967,6915 %N A248547 Numbers n such that 75^n+2 is prime. %C A248547 Dedicated to N. J. A. Sloane for his 75th birthday! %C A248547 Next term, if it exists, is greater than 10000. %C A248547 Next term, if it exists, is greater than 50000. - _Michael S. Branicky_, May 21 2025 %t A248547 Select[Range[0, 1000], PrimeQ[75^# + 2] &] %o A248547 (Magma) [n: n in [0..200] | IsPrime(75^n+2)]; // _Vincenzo Librandi_, Oct 08 2014 %o A248547 (PARI) is(n)=ispseudoprime(75^n+2) \\ _Charles R Greathouse IV_, Jun 13 2017 %Y A248547 Cf. A051783, A087885, A090649, A109076, A138048, A113480, A138049, A138050. %K A248547 nonn,more %O A248547 1,2 %A A248547 _Vaclav Kotesovec_, Oct 08 2014