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A001417 Number of ways of folding a 2 X 2 X ... X 2 n-dimensional map.
(Formerly M1901 N0750)
2
1, 2, 8, 96, 4608, 798720, 361267200, 362794844160 (list; graph; refs; listen; history; text; 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

Table of n, a(n) for n=0..7.

Index entries for sequences obtained by enumerating foldings

CROSSREFS

Cf. A000136, A000560, A195646, A001418.

Sequence in context: A297332 A009752 A137704 * A156926 A001697 A006069

Adjacent sequences:  A001414 A001415 A001416 * A001418 A001419 A001420

KEYWORD

hard,nonn,nice,more

AUTHOR

N. J. A. Sloane.

EXTENSIONS

a(7) from Sean A. Irvine, Dec 21 2017

STATUS

approved

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Last modified January 20 16:46 EST 2019. Contains 319335 sequences. (Running on oeis4.)