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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

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.

W. F. Lunnon, Multi-dimensional map-folding, Computer Journal 14 1971 75-80.

Index entries for sequences obtained by enumerating foldings

CROSSREFS

Cf. A000136, A000560, A195646, A001418.

Sequence in context: A009752 A322736 A137704 * A156926 A326866 A001697

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 March 2 12:26 EST 2021. Contains 341750 sequences. (Running on oeis4.)