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 A179988 #4 Mar 30 2012 18:51:06 %S A179988 1,2,3,4,5,6,7,8,9,26,29,46,49,66,69,86,89,176,273,376,473,576,673, %T A179988 776,873,976,1773,2776,3773,4776,5773,6776,7773,8776,9773,17776,27773, %U A179988 37776 %N A179988 Smallest m such that n = sum of digits of A108971(m). %C A179988 A179987(a(n)) = n and A179987(m) <> n for m < a(n); %C A179988 A108971(a(n)) = A051885(n+1); %C A179988 A007953(A108971(a(n))) = n; %C A179988 conjecture for n>=18: a(n) = A051885(n+1) + 7*(10^floor(n/9) - 1)/9 - 3*(n mod 2). %K A179988 base,nonn %O A179988 1,2 %A A179988 _Reinhard Zumkeller_, Aug 09 2010