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 A075898 #42 Sep 07 2024 07:59:43 %S A075898 2,4,10,22,40,304,1582,3602,46162,127990 %N A075898 Numbers k such that 3^k + k^2 is prime. %C A075898 a(9) > 20000. - _Jon E. Schoenfield_, Jan 14 2015 %C A075898 a(10) > 10^5. - _Lucas A. Brown_, Feb 11 2021 %H A075898 Lucas A. Brown, <a href="https://github.com/lucasaugustus/oeis/blob/main/A075898.py">A075898.py</a> %t A075898 Select[Range[10000], PrimeQ[3^# + #^2] &] (* _Vincenzo Librandi_, Oct 04 2012 *) %o A075898 (Magma) [n: n in [0..1000] | IsPrime(3^n+n^2)]; // _Vincenzo Librandi_, Dec 16 2010 %o A075898 (PARI) is(n)=ispseudoprime(3^n+n^2) \\ _Charles R Greathouse IV_, Jun 12 2017 %Y A075898 Cf. A075899 (for the corresponding primes). %K A075898 nonn,more %O A075898 1,1 %A A075898 _Zak Seidov_, Oct 17 2002 %E A075898 a(6) from _Vincenzo Librandi_, Dec 16 2010 %E A075898 a(7) from _D. S. McNeil_, Dec 16 2010 %E A075898 a(8) from _Vincenzo Librandi_, Oct 04 2012 %E A075898 a(9) from _Lucas A. Brown_, Feb 11 2021 %E A075898 a(10) from _Michael S. Branicky_, Sep 07 2024