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 A214084 #7 Jul 13 2013 12:04:28
%S A214084 0,1,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,
%T A214084 27,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,
%U A214084 38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56
%N A214084 Triangle read by rows: n-th row = {m: n^2 <= m <= n^3}.
%H A214084 Reinhard Zumkeller, <a href="/A214084/b214084.txt">Rows n = 0..15 of triangle, flattened</a>
%o A214084 (Haskell)
%o A214084 a214084 n k = a214084_tabf !! n !! k
%o A214084 a214084_row n = a214084_tabf !! n
%o A214084 a214084_tabf = zipWith enumFromTo a000290_list a000578_list
%Y A214084 Cf. A100104 (row lengths), A214085 (row sums), A000290 (left edge), A000578 (right edge), A079648 (number of primes per row).
%K A214084 nonn,tabf
%O A214084 0,3
%A A214084 _Reinhard Zumkeller_, Jul 07 2012