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 A129293 #10 Apr 15 2024 03:27:15
%S A129293 3,4,6,150,180,240,270,420,570,1290,1320,2310,2550,2730,3360,3390,
%T A129293 4260,4650,5850,5880,6360,6780,9000,9240,9630,10530,10890,11970,13680,
%U A129293 13830,14010,14550,16230,16650,18060,18120,18540,19140,19380,21600,21840,23370
%N A129293 Numbers m such that m^4-1 has no divisors d with 1 < d < m-1.
%C A129293 Essentially the same as A070155, since m^4-1=(m-1)(m+1)(1+m^2). - _R. J. Mathar_, Jun 14 2008
%H A129293 Amiram Eldar, <a href="/A129293/b129293.txt">Table of n, a(n) for n = 1..10000</a>
%F A129293 A129292(a(n)) = #{1, a(n)-1} = 2.
%e A129293 {1,5,7,35,37,185,259,1295} is the set of divisors of 6^4-1, therefore 6 is a term, A129292(6) = #{1,3} = 2.
%o A129293 (PARI) is(k) = k == 3 || (isprime(k-1) && isprime(k+1) && isprime(k^2+1)); \\ _Amiram Eldar_, Apr 15 2024
%Y A129293 Cf. A070155, A129292, A129295, A129297.
%K A129293 nonn
%O A129293 1,1
%A A129293 _Reinhard Zumkeller_, Apr 09 2007