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 A127722 #6 Aug 18 2015 00:08:06
%S A127722 1,3,5,9,12,16,21,26,31,36,42,47,54,60,67,73,80,88,95,103,111,119,127,
%T A127722 135,144,153,161,171,180,189,199,208,218,228,239,249,259,270,281,292,
%U A127722 303,314,325,336,348,360,372,383,396,408,420,432,445,458,470,483,496
%N A127722 Floor of square root of sum of squares of n consecutive odd numbers.
%F A127722 a(n) = A000196[A000447(n)]. - _R. J. Mathar_, Jan 28 2007
%p A127722 A000447 := proc(n) binomial(2*n+1,3) ; end: A000196 := proc(n) floor(sqrt(n)) ; end: A127722 := proc(n) A000196(A000447(n)) ; end: for n from 1 to 30 do printf("%d, ",A127722(n)) ; od ; # _R. J. Mathar_, Jan 28 2007
%t A127722 a = {}; k = 0; Do[k = k + x^2; AppendTo[a, Floor[Sqrt[k]]], {x, 1, 150, 2}]; a
%Y A127722 Cf. A127719, A127720, A127721.
%K A127722 nonn
%O A127722 1,2
%A A127722 _Artur Jasinski_, Jan 25 2007