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 A092061 #18 Aug 01 2024 09:13:09
%S A092061 0,1,2,4,5,8,16,248
%N A092061 Numbers k such that primorial(k)^2 + 1 is prime.
%C A092061 Numbers k such that A002110(k)^2 + 1 is prime.
%C A092061 The next term is greater than 2600. [_Max Alekseyev_, Mar 14 2011]
%C A092061 The next term is greater than 6600. - _Michael S. Branicky_, Aug 01 2024
%t A092061 Join[{0},Flatten[Position[FoldList[Times,Prime[Range[250]]]^2,_?(PrimeQ[ #+1]&)]]] (* _Harvey P. Dale_, Jan 19 2016 *)
%o A092061 (PARI) primorial(n)=s=1;for(i=1,n,s=s*prime(i));return(s); for (i=1,250,if(isprime(primorial(i)^2+1),print1(i,","),print1(".")))
%K A092061 hard,nonn,more
%O A092061 1,3
%A A092061 Mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Feb 19 2004
%E A092061 Officially the 0th primorial is 1 (see A002110), so 0 is also a term in this sequence. _Dmitry Kamenetsky_, Oct 01 2008