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 A169678 #10 Mar 30 2012 20:00:22 %S A169678 0,3,12,26,45,72,105,149,199,255,316,392,401,502,596,733,865,891,1086, %T A169678 1119,1311,1330,1646,1773,2011,2324,2371,2554,2692,3055,3258,3820, %U A169678 3960,4063,4606,5126,5515,5535,6228,6233,7134,7515,7861,8619 %N A169678 The second of a pair of sequences A and B with property that all the differences |a_i - b_j| are distinct - for precise definition see Comments lines in A169677. %C A169678 Computed by _Alois P. Heinz_ and _Wouter Meeussen_, Mar 27 2010 %H A169678 Alois P. Heinz, <a href="/A169678/b169678.txt">Table of n, a(n) for n = 1..200</a> %Y A169678 Cf. A169677, A169679, A169680, A169690-A169693. %K A169678 nonn,nice %O A169678 1,2 %A A169678 _R. K. Guy_ and _N. J. A. Sloane_, Mar 27 2010