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Search: id:A066331
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A066331 Number of fixed hexagonal polyominoes with n cells and tree-like structure. +0
1
1, 3, 9, 29, 99, 348, 1260, 4644, 17382, 65822, 251655, 969819, 3762517, 14680890, 57567228 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Cf. A001207.

Adjacent sequences: A066328 A066329 A066330 this_sequence A066332 A066333 A066334

Sequence in context: A081696 A077587 A001893 this_sequence A099780 A006134 A074526

KEYWORD

nonn

AUTHOR

Jan Kristian Haugland (jankrihau(AT)hotmail.com), Jan 01 2002

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Last modified October 15 20:12 EDT 2008. Contains 145099 sequences.

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