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 A139198 #33 Jan 21 2023 18:10:40
%S A139198 11,503,3991679,622702079,35568742809599,12164510040883199,
%T A139198 2585201673888497663999,884176199373970195454361599999,
%U A139198 822283865417792281772556287999999
%N A139198 a(n) = prime(n)!/10 - 1.
%F A139198 a(n) = A039716(n)/10 - 1. - _Elmo R. Oliveira_, Jan 20 2023
%t A139198 Table[(Prime[n]! - 10)/10, {n, 3, 20}]
%o A139198 (PARI) a(n) = prime(n)!/10 - 1 \\ _David A. Corneth_, Jun 02 2017
%Y A139198 Cf. A039716, A139189, A139190, A139191, A139192, A139193, A139194, A139195, A139196, A139197.
%K A139198 nonn,less
%O A139198 3,1
%A A139198 _Artur Jasinski_, Apr 11 2008