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 A359695 #33 Sep 15 2024 01:58:50 %S A359695 2,4,8,14,42,420,1344 %N A359695 Numbers k such that 29^k - 2 is prime. %C A359695 a(8) > 10^4, if it exists. - _Amiram Eldar_, Mar 10 2023 %C A359695 All terms in this sequence are even. - _Yifan Xie_, Mar 12 2023 %C A359695 a(8) > 5*10^4, if it exists. - _Michael S. Branicky_, Sep 14 2024 %e A359695 4 is a term because 29^4 - 2 = 707279 is a prime number. %t A359695 Select[Range[1400], PrimeQ[29^# - 2] &] (* _Amiram Eldar_, Mar 10 2023 *) %o A359695 (PARI) is(k) = isprime(29^k - 2); %Y A359695 Cf. A087886 (29^k + 2 is prime). %Y A359695 Cf. A128460, A128459, A128457, A109076, A090669, A105772, A109080, (and similar others). %K A359695 nonn,more %O A359695 1,1 %A A359695 _Arsen Vardanyan_, Mar 07 2023