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 A180083 #16 Mar 28 2025 04:56:02
%S A180083 0,1,2,3,4,5,6,7,8,9,19,299,3999999999999999999999999999999999
%N A180083 Smallest k such that digit sum of k > previous term.
%C A180083 a(14) has 444444444444444444444444444444445 digits and is too large to include. - _Arkadiusz Wesolowski_, Feb 17 2011
%e A180083 8 is followed by 9 because 9 is the lowest number with a digit sum > 8.
%e A180083 9 is followed by 19 because 19 is the lowest number with a digit sum (1 + 9 = 10) > 9.
%t A180083 f[s_List] := Block[{k = prev = s[[ -1]]}, While[ prev >= Plus @@ IntegerDigits@ k, k++ ]; Append[s, k]]; Nest[ f, {0}, 11] (* _Robert G. Wilson v_, Aug 15 2010 *)
%Y A180083 Cf. A006050. - _Robert G. Wilson v_, Aug 15 2010
%K A180083 nonn,base
%O A180083 1,3
%A A180083 _Dominick Cancilla_, Aug 09 2010
%E A180083 a(13) from _Robert G. Wilson v_, Aug 15 2010