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A001416 Number of ways of folding a 3 X n strip of stamps.
(Formerly M4271 N1785)
+0
1
1, 6, 60, 1368, 15552, 201240, 2016432, 21582624 (list; graph; listen)
OFFSET

0,2

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

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

LINKS

Index entries for sequences obtained by enumerating foldings

CROSSREFS

Adjacent sequences: A001413 A001414 A001415 this_sequence A001417 A001418 A001419

Sequence in context: A126574 A061573 A092356 this_sequence A003267 A010574 A082681

KEYWORD

nonn

AUTHOR

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

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Last modified November 8 19:30 EST 2009. Contains 166227 sequences.


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