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 A139192 #24 Sep 08 2022 08:45:33
%S A139192 29,1259,9979199,1556755199,88921857023999,30411275102207999,
%T A139192 6463004184721244159999,2210440498434925488635903999999,
%U A139192 2055709663544480704431390719999999,3440938272806586261578994895395225599999999,8363131653290951777042515513360187916287999999999,15103815765843458909338783017128499376816127999999999,64655810377792045160741088788402994992299408097279999999999,1068720821015006391074503438347349912422585947091703431167999999999999
%N A139192 a(n) = (prime(n)! - 4)/4.
%H A139192 Vincenzo Librandi, <a href="/A139192/b139192.txt">Table of n, a(n) for n = 3..87</a>
%F A139192 a(n) = (A139189(n+2) - 3)/4. - _R. J. Mathar_, May 25 2008
%t A139192 Table[(Prime[n]! - 4)/4, {n, 3, 20}]
%o A139192 (Magma) [(Factorial(NthPrime(n))-4)/4: n in [3..20]]; // _Vincenzo Librandi_, Jun 02 2017
%o A139192 (PARI) a(n) = (prime(n)!-4)/4;
%o A139192 lista(nn) = for (n=3, nn, print1(a(n), ", ")); \\ _Michel Marcus_, Feb 17 2018
%Y A139192 Cf. A139189, A139190, A139191, A139192, A139193, A139194, A139195, A139196, A139197, A139198.
%K A139192 nonn
%O A139192 3,1
%A A139192 _Artur Jasinski_, Apr 11 2008
%E A139192 More terms from _R. J. Mathar_, May 25 2008