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 A186981 #8 Mar 30 2012 17:37:34 %S A186981 8,0,8,0,8,0,244,0,1301,288,95,58,146,20,7089,331,571,172,25150,100, %T A186981 67678,4036,3850,4522,182152,3784,140446,9592,32890,18634,646954, %U A186981 14014,126562,29788,93394,57742,1655200,8008,3102319,253594,261118,505219 %N A186981 Number of ordered 10-tuples of distinct pairwise coprime positive integers with largest element n. %H A186981 Alois P. Heinz, <a href="/A186981/b186981.txt">Table of n, a(n) for n = 23..200</a> %e A186981 a(23) = 8 because there are 8 ordered 10-tuples of distinct pairwise coprime positive integers with largest element 23: (1,2,3,5,7,11,13,17,19,23), (1,2,5,7,9,11,13,17,19,23), (1,3,4,5,7,11,13,17,19,23), (1,3,5,7,8,11,13,17,19,23), (1,3,5,7,11,13,16,17,19,23), (1,4,5,7,9,11,13,17,19,23), (1,5,7,8,9,11,13,17,19,23), (1,5,7,9,11,13,16,17,19,23). %Y A186981 Column 10 of triangle A186972. First differences of A186986. %K A186981 nonn %O A186981 23,1 %A A186981 _Alois P. Heinz_, Mar 02 2011