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A056880 Number of n-celled polyominoes without holes, symmetric about axis 2. +0
1
0, 1, 1, 1, 1, 2, 3, 4, 4, 6, 10, 11, 16, 18, 33, 34, 56, 56, 110, 106, 193, 177, 372, 335, 662, 571, 1269, 1084 (list; graph; listen)
OFFSET

1,6
LINKS

Tomas Oliveira e Silva, Enumeration of polyominoes

CROSSREFS

Sequence in context: A007896 A074139 A017832 this_sequence A053273 A049988 A079247

Adjacent sequences: A056877 A056878 A056879 this_sequence A056881 A056882 A056883

KEYWORD

nonn

AUTHOR

njas, Sep 03 2000

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Last modified September 5 01:44 EDT 2008. Contains 143476 sequences.

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