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 A082253 #5 Nov 09 2019 12:48:01
%S A082253 2469,135782,222426283,323436384,424446485,525456586,626466687,
%T A082253 727476788,828486889,929496990,1030507091,1131517192,1232527293,
%U A082253 1333537394,1434547495,1535557596,1636567697,1737577798,1838587899,19395979820,20220420620821,21221421621822
%N A082253 Concatenation of (5n-4), (5n-3), (5n-2), (5n-1) and 5n divided by 5.
%H A082253 Andrew Howroyd, <a href="/A082253/b082253.txt">Table of n, a(n) for n = 1..1000</a>
%e A082253 a(3) = 1112131415/5 = 222426283.
%o A082253 (PARI) a(n)={fromdigits(concat(vector(5, k, digits(5*(n-1)+k))))/5} \\ _Andrew Howroyd_, Nov 09 2019
%Y A082253 Cf. A082251, A082252, A082254, A082255, A082256.
%K A082253 base,easy,nonn
%O A082253 1,1
%A A082253 _Amarnath Murthy_, Apr 11 2003
%E A082253 Terms a(12) and beyond from _Andrew Howroyd_, Nov 09 2019