%I #3 Aug 16 2015 16:34:05
%S 2,3,6,22,402,1228158,100507806843728
%N Erroneous version of A000616.
%D J. Sklansky, General synthesis of tributary switching networks, IEEE Trans. Elect. Computers, 12 (1963), 464-469.
%K dead
%O 0,1