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 A067088 #8 Dec 02 2023 23:17:21
%S A067088 2,2,3,4,54,6391,721719,73719014,819008271,900826453,982644636,
%T A067088 1064462818,1146281001,1228099183,1309917366,1391735548,1473553731,
%U A067088 1555371913,1637190096,1719008278,1800826461,1882644643,1964462826
%N A067088 Floor(X/Y) where X = concatenation of (n+1), (n+2), ...up to 2n and Y = concatenation of 1,2,3,4,... up to n.
%e A067088 a(4) = floor(5678/1234) = floor(4.60129659643435980551053484602917) = 4; a(6) = floor(789101112/123456) = 6391.
%t A067088 f[n_] := (k = 1; x = y = "0"; While[k < n + 1, x = StringJoin[x, ToString[n + k]]; y = StringJoin[y, ToString[2k - 1]]; k++ ]; Return[ Floor[ ToExpression[x] / ToExpression[y]]] ); Table[ f[n], {n, 1, 24} ]
%K A067088 easy,base,nonn
%O A067088 1,1
%A A067088 _Amarnath Murthy_, Jan 07 2002
%E A067088 More terms from _Robert G. Wilson v_, Jan 09 2002
%E A067088 Offset corrected by _Sean A. Irvine_, Dec 02 2023