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2-boustrophedon transform (see A059294) of 1, 1, 1, 1, ...
0

%I #3 Mar 30 2012 16:48:58

%S 1,2,5,16,69,386,2665,21856,207369,2233346,26910637,358654640,

%T 5238083085,83187634306,1427274447313,26308754113344,518495885082513,

%U 10879652226044546,242157991346605909,5698578388375932368,141364265347273219925,3686958817004484491522

%N 2-boustrophedon transform (see A059294) of 1, 1, 1, 1, ...

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Jan 25 2001