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 A178403 #3 Mar 30 2012 18:51:06 %S A178403 0,1,2,3,4,5,6,7,8,9,10,11,12,21,22,23,32,33,34,43,44,45,54,55,56,65, %T A178403 66,67,76,77,78,87,88,89,98,99,100,101,102,110,111,112,120,121,122, %U A178403 123,132,133,134,135,143,145,146,147,153,154,157,158,159,164,169,174,175,185 %N A178403 Numbers containing the rounded up arithmetic mean of their digits at least once, cf. A004427. %C A178403 A178401(a(n)) > 0; complement of A178402. %C A178403 A010785, A050278, A178358, A178359 are subsequences; %C A178403 a(n) = A131207(n) for n < 48; %C A178403 a(n) = A134336(n) for n < 48; %C A178403 a(n+1) = A032981(n) for n < 38. %H A178403 R. Zumkeller, <a href="/A178403/b178403.txt">Table of n, a(n) for n = 1..10000</a> %K A178403 base,nonn %O A178403 1,3 %A A178403 _Reinhard Zumkeller_, May 27 2010