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A001418 Number of ways of folding an n X n sheet of stamps.
(Formerly M4587 N1956)
+0
1
1, 8, 1368, 300608, 186086600 (list; graph; listen)
OFFSET

0,2

REFERENCES

Lunnon, W. F.; Multi-dimensional map-folding. Comput. J. 14 1971 75-80.

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).

LINKS

Eric Weisstein's World of Mathematics, Map Folding

Index entries for sequences obtained by enumerating foldings

CROSSREFS

Sequence in context: A091868 A162090 A017187 this_sequence A123268 A088080 A160103

Adjacent sequences: A001415 A001416 A001417 this_sequence A001419 A001420 A001421

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 19 21:04 EST 2009. Contains 171054 sequences.


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