%I #6 Mar 30 2012 16:48:45
%S 1,2,-4,72,-2168,114864,-10671216,1787642272,-557621854080,
%T 332091938264960,-383877081387120640,870132605833456937472,
%U -3891989736269204588784384,34485850497928703119235323904,-606809291874393995479640098992128
%N Reversion of [1,2,12,152,3640,...] (A053549).
%H <a href="/index/Res#revert">Index entries for reversions of series</a>
%K sign
%O 1,2
%A _N. J. A. Sloane_, Jan 16 2000