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 A125262 #21 Jul 14 2025 14:44:36
%S A125262 1,13,17,23,61,73,77,101,137,215,221,283,307,317,361,431,457,473,481,
%T A125262 641,731,767,817,881,985,1015,1061,1145,1235,1283,1333,1337,1343,1531,
%U A125262 1693,1711,1817,1847,1853,1867,1903,1963,2057,2093,2113,2161,2201,2363
%N A125262 Numbers k such that k^7 + 6 is prime.
%H A125262 Carmine Suriano, <a href="/A125262/b125262.txt">Table of n, a(n) for n = 1..2374</a>
%t A125262 lst={};k=7;Do[If[PrimeQ[n^k+k-1], AppendTo[lst, n]], {n, 0, 10^4}];lst (* _Vladimir Joseph Stephan Orlovsky_, Sep 10 2008 *)
%t A125262 Select[Range[2500],PrimeQ[#^7+6]&] (* _Harvey P. Dale_, May 05 2016 *)
%o A125262 (PARI) is(n)=isprime(n^7+6) \\ _Charles R Greathouse IV_, Feb 17 2017
%Y A125262 Other sequences of the type "Numbers k such that k^j + j - 1 is prime": A000040 (j=1), A005574 (j=2), A067200 (j=3), A125259-A125265 (j=4..11).
%K A125262 nonn
%O A125262 1,2
%A A125262 _Zak Seidov_, Nov 26 2006