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 A178362 #4 Aug 10 2012 17:19:36 %S A178362 2,12,13,21,22,30,31,40,103,104,105,112,113,114,121,122,123,130,131, %T A178362 132,140,141,150,202,203,204,211,212,213,220,221,222,230,231,240,301, %U A178362 302,303,310,311,312,320,321,330,400,401,402,410,411,420,500,501,510,600 %N A178362 Numbers with rounded up arithmetic mean of digits = 2. %C A178362 A004427(a(n)) = 2; %C A178362 A000027 = union of A178361, A178363, A178364, A178365, A178366, A178367, A178368, A178369, and this sequence. %t A178362 Select[Range[600],Ceiling[Mean[IntegerDigits[#]]]==2&] (* _Harvey P. Dale_, Aug 10 2012 *) %K A178362 base,nonn %O A178362 1,1 %A A178362 _Reinhard Zumkeller_, May 27 2010