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Search: id:A030225
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A030225 Number of n-celled polyhexes (hexagonal polyominoes) with bilateral symmetry. +0
3
1, 1, 3, 4, 11, 17, 46, 75, 202, 341, 914, 1581, 4222, 7436, 19794, 35357, 93859, 169558, 449039, 818793 (list; graph; listen)
OFFSET

1,3

CROSSREFS

A030225 = 2*A000228 - A006535.

Sequence in context: A026753 A027222 A026380 this_sequence A060285 A025079 A036652

Adjacent sequences: A030222 A030223 A030224 this_sequence A030226 A030227 A030228

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

EXTENSIONS

More terms from Joseph Myers (jsm(AT)polyomino.org.uk), Sep 21 2002

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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