A219116 Number of semicomplete digraphs on n nodes with an "Emperor".
0, 1, 2, 9, 108, 3645, 354294, 100442349, 83682825624, 205891132094649, 1500946352969991210, 32497439772059170685073, 2093390532109442148854046084, 401741006974223960704968343445877, 229924845755649214047240549209929574046
Offset: 0
Keywords
Programs
-
Maxima
A219116(n):=n*3^((n^2-3*n+2)/2)$ makelist(A219116(n),n,0,14); /* Martin Ettl, Nov 13 2012 */
Formula
a(n) = n*3^((n^2 - 3*n + 2)/2).
Comments