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 A138592 #5 Mar 23 2016 11:50:47 %S A138592 6,10,14,15,18,20,21,22,25,26,27,28,30,33,34,35,36,38,39,40,42,44,45, %T A138592 46,49,50,51,52,54,55,56,57,58,60,62,63,65,66,68,69,70,72,74,75,76,77, %U A138592 78,80,81,82,84,85,86,87,88,90,91,92,93,94,95,98,99,100,102,104,105,106 %N A138592 Sums of 4 or more consecutive nonnegative integers. %H A138592 Ray Chandler, <a href="/A138592/b138592.txt">Table of n, a(n) for n = 1..10000</a> %e A138592 0+1+2+3=6, 1+2+3+4=10, 2+3+4+5=14, 1+2+3+4+5=15,... %t A138592 Array[r,9];k=0;For[i=0,i<=33,a=i*3+3;For[j=i+3,j<=34,a=a+j;k++;r[k]=a;j++ ];i++ ];q=Union[Array[r,k]];StringTake[ToString[q],99] %K A138592 nonn %O A138592 1,1 %A A138592 _Vladimir Joseph Stephan Orlovsky_, May 13 2008 %E A138592 More terms from _Vladimir Joseph Stephan Orlovsky_, Mar 06 2010