%I #12 Feb 16 2023 19:08:58
%S 0,0,1,4,14,47,164,565,1982,6977,24850,89082,321855,1169853,4276923,
%T 15713799,57998270,214934984,799473752,2983682702,11169374372,
%U 41929478873,157807392886,595340271682,2250901007539,8527699269192,32369066434276
%N Duplicate of A000908.
%K dead
%O 0,4