%I A001010 M0323 N0120
%S A001010 1,2,2,4,6,8,18,20,56,48,178,132,574,348,1870,1008,6144,2812,
%T A001010 20314,8420,67534,24396,225472,74756,755672,222556,2540406,
%U A001010 693692,8564622,2107748,28941258,6656376,98011464,20548932
%N A001010 Number of symmetric foldings of a strip of n stamps.
%D A001010 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001010 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001010 J. E. Koehler, Folding a strip of stamps, J. Combin. Theory, 5 (1968), 
               135-152.
%H A001010 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               StampFolding.html">Link to a section of The World of Mathematics.</
               a>
%H A001010 <a href="Sindx_Fo.html#fold">Index entries for sequences obtained by 
               enumerating foldings</a>
%Y A001010 Cf. A007822, A000682.
%Y A001010 Sequence in context: A145465 A153958 A153964 this_sequence A091966 A055529 
               A035564
%Y A001010 Adjacent sequences: A001007 A001008 A001009 this_sequence A001011 A001012 
               A001013
%K A001010 nonn,nice
%O A001010 1,2
%A A001010 N. J. A. Sloane (njas(AT)research.att.com), legendre(AT)biologie.ens.fr 
               (Stephane LEGENDRE)