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 A188936 #34 Jul 26 2024 12:33:43 %S A188936 1,2,3,4,5,6,8,10,11,12,19,27,28,32,36,48,56,61,131,170,251,750,771, %T A188936 779,790,874,1176,1728,2604,3541,5394,6203,9230,14666,15680,26712, %U A188936 45840,46019,56220 %N A188936 Numbers k such that (2^k + 3)^2 - 8 is prime. %H A188936 Daniel Shanks, <a href="https://doi.org/10.1090/S0025-5718-1971-0297737-4">Gauss's ternary form reduction and the 2-Sylow subgroup</a>, Math. Comp. 25 (1971), 837-853. %o A188936 (PARI) for(n=1,10^6,if(isprime((2^n+3)^2-8),print1(n,", "))); /* _Joerg Arndt_, Apr 25 2011 */ %Y A188936 Cf. A188129, A188661, A188937. %K A188936 nonn,more %O A188936 1,2 %A A188936 _N. J. A. Sloane_, Apr 14 2011 %E A188936 a(22)-a(30) from _Joerg Arndt_, Apr 25 2011 %E A188936 a(31)-a(33) from _Vincenzo Librandi_, May 13 2011 %E A188936 a(36) from _Charles R Greathouse IV_, Oct 10 2011 %E A188936 a(37)-a(39) from _Charles R Greathouse IV_, Oct 11 2011 %E A188936 a(34)-a(35) inserted by _Michael S. Branicky_, Jul 25 2024