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 A299171 #18 Apr 14 2021 03:03:57 %S A299171 2,3,5,7,11,13,17,19,23,29,31,41,47,53,59,71,79,83,89,97,107,127,137, %T A299171 139,149,167,179,191,199,223,229,239,251,269,293,349,359,367,383,419, %U A299171 431,449,479,499,503,587,593,599,643,647,719,809,827,839,863,881,919 %N A299171 Primes p such that Ramanujan number tau(p) is divisible by p+1. %H A299171 Amiram Eldar, <a href="/A299171/b299171.txt">Table of n, a(n) for n = 1..900</a> %t A299171 Select[Range[1000], PrimeQ[#] && Divisible[RamanujanTau[#], #+1] &] (* _Amiram Eldar_, Apr 14 2021 *) %o A299171 (PARI) isok(p) = isprime(p) && !(ramanujantau(p) % (p+1)); \\ _Michel Marcus_, Feb 05 2018 %Y A299171 Cf. A000594, A007659, A299157, A299163, A299172. %K A299171 nonn %O A299171 1,1 %A A299171 _Seiichi Manyama_, Feb 04 2018