%I #3 Mar 30 2012 17:37:01
%S 1,1,1,4,20,220,2020,26310,332410,5189380,83623310,1551800020,
%T 30389755640,659473386920,15190156196820,379169061066320,
%U 10036224774532890,283940562045261940,8488369128461080030
%N Shifts left under "BHJ" (reversible, identity, labeled) transform.
%K nonn,eigen
%O 1,4
%A _Christian G. Bower_