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 A087899 #18 Jan 19 2023 09:36:16
%S A087899 5,29,389,8969,331889,17590169,1178541389,93104769809,14617448860169,
%T A087899 2528818652809409,483004362686597309,95151859449259670069,
%U A087899 26357065067444928609389,7406335283952024939238589,3414320565901883496988989989,1635459551067002195057726205209
%N A087899 Primes associated with A087898.
%H A087899 Amiram Eldar, <a href="/A087899/b087899.txt">Table of n, a(n) for n = 1..214</a>
%F A087899 a(n) = -1 + Product_{k=1..n-1} A087898(k).
%F A087899 a(n) == 9 (mod 10) for n>1. - _Sam Alexander_, Jan 06 2005
%t A087899 s = {}; ps = {2}; Do[r = Times @@ ps; p = ps[[-1]]; While[p = NextPrime[p]; ! PrimeQ[r*p - 1]]; AppendTo[ps, p]; AppendTo[s, r*p - 1], {15}]; s (* _Amiram Eldar_, Jan 19 2023 *)
%Y A087899 Cf. A087898.
%K A087899 nonn
%O A087899 1,1
%A A087899 _Lekraj Beedassy_, Oct 14 2003
%E A087899 a(14) from _Sam Alexander_, Jan 06 2005
%E A087899 More terms from _Amiram Eldar_, Jan 19 2023