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A054936 Number of achiral planar maps on n nodes up to orientation-preserving isomorphisms. +0
1
2, 4, 14, 47, 184, 761, 3314, 14997, 69886, 333884 (list; graph; listen)
OFFSET

1,1

LINKS

V. A. Liskovets, Some easily derivable sequences, J. Integer Sequences, 3 (2000), #00.2.2.

CROSSREFS

Sequence in context: A101536 A005437 A062868 this_sequence A006443 A102879 A032312

Adjacent sequences: A054933 A054934 A054935 this_sequence A054937 A054938 A054939

KEYWORD

nonn,easy,more

AUTHOR

njas, May 24 2000

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Last modified September 5 17:15 EDT 2008. Contains 143476 sequences.


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