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A001011
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Number of ways to fold a strip of n blank stamps.
(Formerly M1455 N0576)
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5
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1, 1, 2, 5, 14, 38, 120, 353, 1148, 3527, 11622, 36627, 121622, 389560, 1301140, 4215748, 13976335, 46235800, 155741571, 512559185, 1732007938, 5732533570, 19423092113, 64590165281, 219349187968, 732358098471
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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REFERENCES
| M. Gardner, Mathematical Games, Sci. Amer. Vol. 209 (No. 3, Mar. 1963), p. 262.
J. E. Koehler, Folding a strip of stamps, J. Combin. Theory, 5 (1968), 135-152.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| N. J. A. Sloane, Illustration of initial terms (Fig. 17 of the 1973 Handbook of Integer Sequences)
N. J. A. Sloane, My favorite integer sequences, in Sequences and their Applications (Proceedings of SETA '98).
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Index entries for sequences obtained by enumerating foldings
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CROSSREFS
| Cf. A000682, A086441.
Sequence in context: A053419 A079227 A148314 * A148315 A141752 A142586
Adjacent sequences: A001008 A001009 A001010 * A001012 A001013 A001014
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KEYWORD
| nonn,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), legendre(AT)biologie.ens.fr (Stephane LEGENDRE)
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