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 A219049 #19 Nov 12 2023 14:28:08
%S A219049 5,8,18,21,69,84,181,216,461,642,672,2413,3681,5666,12281,14949,19508,
%T A219049 27817,34061,43236,43733,81828
%N A219049 Numbers k such that 3^k - 32 is prime.
%C A219049 a(23) > 2*10^5. - _Robert Price_, Dec 22 2013
%e A219049 3^5 - 32 = 211 (prime), so 5 is in the sequence.
%t A219049 Do[If[PrimeQ[3^n - 32], Print[n]], {n, 10000}]
%o A219049 (PARI) is(n)=isprime(3^n-32) \\ _Charles R Greathouse IV_, Feb 17 2017
%Y A219049 Cf. Sequences of numbers k such that 3^k + m is prime:
%Y A219049 (m = 2) A051783, (m = -2) A014224, (m = 4) A058958, (m = -4) A058959,
%Y A219049 (m = 8) A217136, (m = -8) A217135, (m = 10) A217137, (m = -10) A217347,
%Y A219049 (m = 14) A219035, (m = -14) A219038, (m = 16) A205647, (m = -16) A219039,
%Y A219049 (m = 20) A219040, (m = -20) A219041, (m = 22) A219042, (m = -22) A219043,
%Y A219049 (m = 26) A219044, (m = -26) A219045, (m = 28) A219046, (m = -28) A219047,
%Y A219049 (m = 32) A219048, (m = -32) A219049, (m = 34) A219050, (m = -34) A219051. Note that if m is a multiple of 3, 3^k + m is also a multiple of 3 (for k greater than 0), and as such isn't prime.
%K A219049 nonn,more
%O A219049 1,1
%A A219049 _Nicolas M. Perrault_, Nov 10 2012
%E A219049 a(15)-a(22) from _Robert Price_, Dec 22 2013