%I A001011 M1455 N0576
%S A001011 1,1,2,5,14,38,120,353,1148,3527,11622,36627,121622,389560,1301140,
%T A001011 4215748,13976335,46235800,155741571,512559185,1732007938,5732533570,
%U A001011 19423092113,64590165281,219349187968,732358098471
%N A001011 Number of ways to fold a strip of n blank stamps.
%D A001011 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001011 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001011 M. Gardner, Mathematical Games, Sci. Amer. Vol. 209 (No. 3, Mar. 1963), 
               p. 262.
%D A001011 J. E. Koehler, Folding a strip of stamps, J. Combin. Theory, 5 (1968), 
               135-152.
%H A001011 N. J. A. Sloane, <a href="a001011.pdf">Illustration of initial terms</
               a> (Fig. 17 of the 1973 Handbook of Integer Sequences)
%H A001011 N. J. A. Sloane, <a href="http://www.research.att.com/~njas/doc/sg.txt">
               My favorite integer sequences</a>, in Sequences and their Applications 
               (Proceedings of SETA '98).
%H A001011 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 A001011 <a href="Sindx_Fo.html#fold">Index entries for sequences obtained by 
               enumerating foldings</a>
%Y A001011 Cf. A000682, A086441.
%Y A001011 Sequence in context: A053419 A079227 A148314 this_sequence A148315 A141752 
               A142586
%Y A001011 Adjacent sequences: A001008 A001009 A001010 this_sequence A001012 A001013 
               A001014
%K A001011 nonn,nice
%O A001011 1,3
%A A001011 N. J. A. Sloane (njas(AT)research.att.com), legendre(AT)biologie.ens.fr 
               (Stephane LEGENDRE)