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 A186980 #7 Mar 30 2012 17:37:34 %S A186980 8,0,0,0,81,1,74,4,70,6,1056,1,3640,793,398,247,621,89,14930,956,1662, %T A186980 513,42243,285,93093,6831,6765,7785,213681,5511,162549,13299,44517, %U A186980 25245,633633,16731,145215,36003,108885,67779,1437252,9867,2406404 %N A186980 Number of ordered 9-tuples of distinct pairwise coprime positive integers with largest element n. %H A186980 Alois P. Heinz, <a href="/A186980/b186980.txt">Table of n, a(n) for n = 19..200</a> %e A186980 a(24) = 1 because there is one ordered 9-tuple of distinct pairwise coprime positive integers with largest element 24: (1,5,7,11,13,17,19,23,24). %Y A186980 Column 9 of triangle A186972. First differences of A186985. %K A186980 nonn %O A186980 19,1 %A A186980 _Alois P. Heinz_, Mar 02 2011