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 A104800 #9 May 28 2023 08:45:19
%S A104800 198765432101,498765432101,498765432107,798765432103,798765432109,
%T A104800 987654321007,987654321029,987654321047,987654321061,987654321089,
%U A104800 987654321097,1098765432101,1398765432101,1498765432103,1898765432107,1987654321019,1987654321069,2898765432107,2987654321017,2987654321039
%N A104800 Primes containing sublist {9876543210}.
%H A104800 David A. Corneth, <a href="/A104800/b104800.txt">Table of n, a(n) for n = 1..10000</a>
%H A104800 David A. Corneth, <a href="/A104800/a104800.gp.txt">PARI program</a>
%o A104800 (PARI) \\ See PARI link \\ _David A. Corneth_, May 28 2023
%Y A104800 Cf. A104799, A104801, A104802.
%K A104800 nonn,base
%O A104800 1,1
%A A104800 _Zak Seidov_, Mar 26 2005
%E A104800 Missing 987654321007 inserted by and more terms from _David A. Corneth_, May 28 2023