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 A139090 #9 Sep 19 2020 16:46:52
%S A139090 3,31,31,23,379,83,610301,293,101,47,281,127,278174297,2971,109,
%T A139090 5090615254324820333,46411,106087,269,288931,59047158151,120871,373,
%U A139090 19140822523,56595118147,1708207,331,38749,157,2927,2143
%N A139090 a(n) = smallest prime divisor of the number prime(n)!/9 + 1.
%t A139090 a = {}; Do[w = FactorInteger[(Prime[n]! + 9)/9]; AppendTo[a, First[w][[1]]], {n, 4, 16}]; a
%t A139090 Table[FactorInteger[p!/9+1][[1,1]],{p,Prime[Range[4,35]]}] (* _Harvey P. Dale_, Sep 19 2020 *)
%Y A139090 Cf. A082672, A089085, A089130, A117141, A007749, A139056-A139066, A020458, A139068, A137390, A139070-A139075, A136019, A136020, A136026, A136027, A139089-A139092.
%K A139090 more,nonn
%O A139090 4,1
%A A139090 _Artur Jasinski_, Apr 08 2008
%E A139090 More terms from _Jon E. Schoenfield_, Jul 16 2010