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 A197039 #8 Mar 30 2012 18:35:59 %S A197039 1,4,9,10,12,21,22,40,48,84,88,90,100,102,120,123,126,132,162,168,186, %T A197039 201,202,210,213,216,220,231,261,312,321,333,400,408,480,612,618,621, %U A197039 681,804,808,816,840,861,880,900,1000,1002,1020,1023,1026,1032,1062 %N A197039 Numbers such that sum of the cube of decimal digits is a perfect square. %H A197039 Harvey P. Dale, <a href="/A197039/b197039.txt">Table of n, a(n) for n = 1..1000</a> %e A197039 261 is in the sequence because 2^3+6^3+1^3 = 15^2. %t A197039 Select[Range[1100],IntegerQ[Sqrt[Apply[Plus,IntegerDigits[#]^3]]]&] %Y A197039 Cf. A028839, A175396. %K A197039 nonn,base %O A197039 1,2 %A A197039 _Michel Lagneau_, Oct 08 2011