%I A001397 M3602 N1461
%S A001397 4,24,188,1368,10572
%N A001397 2n-step walks on diamond lattice.
%D A001397 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001397 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001397 J. L. Martin, The exact enumeration of self-avoiding walks on a lattice, 
               Proc. Camb. Phil. Soc., 58 (1962), 92-101.
%Y A001397 Sequence in context: A111556 A135905 A028498 this_sequence A001506 A088815 
               A036691
%Y A001397 Adjacent sequences: A001394 A001395 A001396 this_sequence A001398 A001399 
               A001400
%K A001397 nonn,walk
%O A001397 1,1
%A A001397 N. J. A. Sloane (njas(AT)research.att.com).