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A142871 Number of permutation symbols of type *r(n) for hyperbolic archimedean tesselations of rank n. +0
2
1, 6, 2, 9, 6, 24, 20, 76, 76, 272, 312, 1100, 1384, 4684, 6512, 23280, 32400, 118272 (list; graph; listen)
OFFSET

1,2

COMMENT

See Conway et al. for precise definition.

REFERENCES

J. H. Conway et al., The Symmetries of Things, Peters, 2008, p. 261.

CROSSREFS

One bisection appears to coincide with A000898. For the other see A142877.

Sequence in context: A100123 A153633 A118388 this_sequence A050235 A018801 A055021

Adjacent sequences: A142868 A142869 A142870 this_sequence A142872 A142873 A142874

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Oct 03 2008

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.


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