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 A214206 #8 Dec 22 2012 13:12:22 %S A214206 0,4,7,8,10,11,12,13,14,15,16,17,17,18,19,20,20,21,21,22,23,23,24,24, %T A214206 25,25,26,27,27,28,28,28,29,29,30,30,31,31,32,32,32,33,33,34,34,35,35, %U A214206 35,36,36,36,37,37,38,38,38,39,39,39,40,40,40,41,41,41,42,42,42,43,43,43,44,44,44,45,45,45,45,46,46,46,47,47,47,48,48,48,48,49,49,49,49,50 %N A214206 a(n) = largest m such that m*(m+1)/2 <= 14*n. %C A214206 Created in an attempt to simplify the definition of certain sequences currently under review by the editors. %H A214206 Harvey P. Dale, <a href="/A214206/b214206.txt">Table of n, a(n) for n = 0..1000</a> %F A214206 a(n) = A003056(14*n). - _R. J. Mathar_, Jul 09 2012 %e A214206 4*5/2 <= 14 but 5*6/2 > 14, so a(1)=4. %t A214206 Array[Floor[(Sqrt[1+112#]-1)/2]&,100,0] (* _Harvey P. Dale_, Dec 22 2012 *) %K A214206 nonn %O A214206 0,2 %A A214206 _N. J. A. Sloane_, Jul 08 2012