Search: id:A060897
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%I A060897
%S A060897 1,4,12,44,144,528,1808,6676,23536,87568,315136,1180680,4314560,
%T A060897 16263896,60138816,227899484,850600944,3238194560,12177384544,
%U A060897 46542879384,176110444736,675431779856,2568878867200,9882068082112
%N A060897 Number of walks of length n on square lattice, starting at origin, staying 
               in first and third quadrants.
%C A060897 Is there a formula analogous to the (conjectured) formula for A060900?
%Y A060897 Cf. A005566, A001700, A060898-A060900.
%Y A060897 Sequence in context: A149358 A149359 A167402 this_sequence A005190 A149360 
               A149361
%Y A060897 Adjacent sequences: A060894 A060895 A060896 this_sequence A060898 A060899 
               A060900
%K A060897 nonn
%O A060897 0,2
%A A060897 David W. Wilson (davidwwilson(AT)comcast.net), May 05 2001

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