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 A178364 #6 Nov 21 2013 12:50:04 %S A178364 4,16,17,25,26,34,35,43,44,52,53,61,62,70,71,80,109,118,119,127,128, %T A178364 129,136,137,138,145,146,147,154,155,156,163,164,165,172,173,174,181, %U A178364 182,183,190,191,192,208,209,217,218,219,226,227,228,235,236,237,244,245 %N A178364 Numbers with rounded up arithmetic mean of digits = 4. %C A178364 A004427(a(n)) = 4; %C A178364 A000027 = union of A178361, A178362, A178363, A178365, A178366, A178367, A178368, A178369, and this sequence. %H A178364 R. Zumkeller, <a href="/A178364/b178364.txt">Table of n, a(n) for n = 1..1000</a> %t A178364 Select[Range[250],Ceiling[Mean[IntegerDigits[#]]]==4&] (* _Harvey P. Dale_, Sep 30 2011 *) %K A178364 base,nonn %O A178364 1,1 %A A178364 _Reinhard Zumkeller_, May 27 2010