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 A386618 #15 Aug 24 2025 23:17:27
%S A386618 2,173,815730977
%N A386618 Primes of the form 2^k + 13^k.
%C A386618 If 13^k + 2^k is prime then k is either 0 or a power of 2. The corresponding values of k for a(1)-a(4) are 0, 2, 8 and 512. The fourth value is too long to enter.
%H A386618 Vincenzo Librandi, <a href="/A386618/b386618.txt">Table of n, a(n) for n = 1..4</a>
%t A386618 Select[Table[2^n+13^n,{n,0,600}],PrimeQ]
%o A386618 (Magma) [a: n in [0..200] | IsPrime(a) where a is 13^n+2^n ];
%Y A386618 Cf. A082101, A094475, A094476, A094477, A176946, A176947.
%K A386618 nonn,new
%O A386618 1,1
%A A386618 _Vincenzo Librandi_, Aug 17 2025