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 A088343 #15 Jul 29 2024 12:36:34
%S A088343 1,2,5,9,10,22,25,26,110,998,1158,1410,9860,100270,999100,1005274,
%T A088343 1007044,1055274,1059163,1063242,1065027,1083148,1099446,1103722,
%U A088343 1144506,10146315,99992456,99997120,101009312,101924112,102163463,102706016
%N A088343 Records in A069862.
%C A088343 A069862 is the smallest k such that n divides the concatenation of numbers from (n+1) to (n+k), where (n+1) is on the most significant side. - _Robert G. Wilson v_, Nov 14 2003
%H A088343 Chuck Seggelin, <a href="https://web.archive.org/web/20040109233713/http://www.plastereddragon.com/maths/catcon.htm">Concatenation of Consecutive Integers</a>.
%t A088343 f[n_] := Block[{k = n + 1}, d = k; While[ d != 0, k++; d = Mod[d*10^Floor[ Log[10, k] + 1] + k, n]]; k - n]; a = 0; Do[b = f[n]; If[b > a, a = b; Print[n, " = ", b]], {n, 1, 34500}]
%Y A088343 Cf. A069862, A088947.
%K A088343 nonn,more,base
%O A088343 1,2
%A A088343 _N. J. A. Sloane_, Nov 14 2003
%E A088343 More terms from _Robert G. Wilson v_ and Chuck Seggelin (chuck(AT)plastereddragon.com), Nov 14 2003
%E A088343 Edited by _Charles R Greathouse IV_, Apr 30 2010
%E A088343 a(29)-a(32) from _Michael S. Branicky_, Jul 29 2024