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 A178365 #3 Mar 30 2012 18:51:06 %S A178365 5,18,19,27,28,36,37,45,46,54,55,63,64,72,73,81,82,90,91,139,148,149, %T A178365 157,158,159,166,167,168,175,176,177,184,185,186,193,194,195,229,238, %U A178365 239,247,248,249,256,257,258,265,266,267,274,275,276,283,284,285,292 %N A178365 Numbers with rounded up arithmetic mean of digits = 5. %C A178365 A004427(a(n)) = 5; %C A178365 A000027 = union of A178361, A178362, A178363, A178364, A178366, A178367, A178368, A178369, and this sequence. %H A178365 R. Zumkeller, <a href="/A178365/b178365.txt">Table of n, a(n) for n = 1..1000</a> %K A178365 base,nonn %O A178365 1,1 %A A178365 _Reinhard Zumkeller_, May 27 2010