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 A178363 #3 Mar 30 2012 18:51:06 %S A178363 3,14,15,23,24,32,33,41,42,50,51,60,106,107,108,115,116,117,124,125, %T A178363 126,133,134,135,142,143,144,151,152,153,160,161,162,170,171,180,205, %U A178363 206,207,214,215,216,223,224,225,232,233,234,241,242,243,250,251,252,260 %N A178363 Numbers with rounded up arithmetic mean of digits = 3. %C A178363 A004427(a(n)) = 3; %C A178363 A000027 = union of A178361, A178362, A178364, A178365, A178366, A178367, A178368, A178369, and this sequence. %H A178363 R. Zumkeller, <a href="/A178363/b178363.txt">Table of n, a(n) for n = 1..1000</a> %K A178363 base,nonn %O A178363 1,1 %A A178363 _Reinhard Zumkeller_, May 27 2010