%I
%S 1,2,6,8,40,96,168,384,1728,15360,50688,221184,299520,1290240,3628800,
%T 30965760,65802240,743178240,7060193280,237817036800,624269721600,
%U 5231974809600,28716407193600,479439146188800
%N Analog of A095236 when the phones are arranged in a circle.
%H Max Alekseyev, <a href="/A095239/b095239.txt">Table of n, a(n) for n = 1..100</a>
%Y Cf. A095236, A095240.
%K nonn
%O 1,2
%A _Neil Fernandez_, Jul 03 2004
%E Corrected and extended by _Don Reble_, Jul 04 2004
