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A091302
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Number of equivalence classes of Hamiltonian cycles (or Gray codes) in the binary n-cube.
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4
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OFFSET
| 1,3
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COMMENTS
| A066037(n)/(n!/2). See A006069, A003042, A066037 for more information.
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REFERENCES
| D. E. Knuth, The Art of Computer Programming, vol. 4A, Combinatorial Algorithms, (to appear), section 7.2.1.1.
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CROSSREFS
| Cf. A003042.
Sequence in context: A012525 A165975 A051590 * A042567 A142112 A053976
Adjacent sequences: A091299 A091300 A091301 * A091303 A091304 A091305
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), following a suggestion of Gordon Royle, Feb 20 2004
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EXTENSIONS
| a(6) from Michel Deza, Mar 28 2010
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