%I #14 Apr 18 2019 09:53:34
%S 1,8,102,288,12960,86400,7076160,81285120
%N Number of longest paths in the stacked book graph S_{n+1} square P_n.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/LongestPath.html">Longest Path</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/StackedBookGraph.html">Stacked Book Graph</a>
%Y Cf. A307028 (longest path lengths).
%K nonn,more
%O 1,2
%A _Eric W. Weisstein_, Apr 09 2019