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 A186978 #7 Mar 30 2012 17:37:34 %S A186978 6,0,0,2,56,1,219,13,27,15,777,28,640,102,563,127,3923,28,7859,1792, %T A186978 1505,966,2354,392,21313,2289,3969,1344,42828,714,69360,7566,8118, %U A186978 8826,122883,5082,93084,10890,33594,19338,266024,11011,82350,23298,63917 %N A186978 Number of ordered septuples of distinct pairwise coprime positive integers with largest element n. %H A186978 Alois P. Heinz, <a href="/A186978/b186978.txt">Table of n, a(n) for n = 13..200</a> %e A186978 a(16) = 2 because there are 2 ordered septuples of distinct pairwise coprime positive integers with largest element 16: (1,3,5,7,11,13,16), (1,5,7,9,11,13,16). %Y A186978 Column 7 of triangle A186972. First differences of A186983. %K A186978 nonn %O A186978 13,1 %A A186978 _Alois P. Heinz_, Mar 02 2011