%I A060898
%S A060898 1,4,14,54,200,776,2940,11466,43980,172170,665544,2612764,10154144,
%T A060898 39949000,155864280,614260062,2403739140,9486263092,37209147800,
%U A060898 147012850512,577741491404,2284848892872,8993216244896
%N A060898 Number of walks of length n on square lattice, starting at origin, staying 
               in first, second and third quadrants
%C A060898 Is there a formula analogous to the (conjectured) formula for A060900?
%Y A060898 Cf. A005566, A001700, A060897-A060900.
%Y A060898 Sequence in context: A000651 A118896 A145211 this_sequence A045501 A162481 
               A088655
%Y A060898 Adjacent sequences: A060895 A060896 A060897 this_sequence A060899 A060900 
               A060901
%K A060898 nonn
%O A060898 0,2
%A A060898 David W. Wilson (davidwwilson(AT)comcast.net), May 05 2001