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 A139070 #17 Jun 09 2025 00:52:24
%S A139070 13,73,3991681,47900161,130767436801,2585201673888497664001,
%T A139070 40329146112660563558400001,
%U A139070 1376375309122634504631597958158090240000001,11962222086548019456196316149565771506438373376000000001
%N A139070 Primes of the form (10+k!)/10.
%C A139070 For numbers k for which (10+k!)/10 is prime see A139071.
%H A139070 Amiram Eldar, <a href="/A139070/b139070.txt">Table of n, a(n) for n = 1..16</a>
%F A139070 a(n) = A139157(A139071(n)). - _Amiram Eldar_, Oct 14 2024
%t A139070 a = {}; Do[If[PrimeQ[(n! + 10)/10], AppendTo[a, (n! + 10)/10]], {n, 1, 50}]; a
%t A139070 Select[(Range[50]!+10)/10,PrimeQ] (* _Harvey P. Dale_, Sep 18 2013 *)
%o A139070 (PARI) for(k=5,1e3,if(ispseudoprime(t=k!/10+1),print1(t", "))) \\ _Charles R Greathouse IV_, Jul 15 2011
%Y A139070 Cf. A020458, A082672, A089085, A089130, A117141, A007749, A139056, A139057, A139058, A139059, A139060, A139061, A139062, A139063, A139064, A139065, A139066, A139068, A137390, A139071, A139072, A139157.
%K A139070 nonn
%O A139070 1,1
%A A139070 _Artur Jasinski_, Apr 07 2008