A001416 - OEIS

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A001416

Number of ways of folding a 3 X n strip of stamps.
(Formerly M4271 N1785)

1, 6, 60, 1368, 15552, 201240, 2016432, 21582624 (list; graph; refs; listen; history; internal format)

	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	`Index entries for sequences obtained by enumerating foldings`
	CROSSREFS	`Sequence in context: A126574 A061573 A092356 * A003267 A010574 A082681` `Adjacent sequences: A001413 A001414 A001415 * A001417 A001418 A001419`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 06:39 EST 2012. Contains 205861 sequences.