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Search: id:A057418
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A057418 Number of n-celled polyominoes with 1 hole. +0
6
1, 6, 37, 195, 975, 4622, 21128, 94109, 410820, 1766591, 7506179, 31596240, 131991619, 547992183, 2263477612, 9309386178, 38150082057, 155859235424, 635067478628, 2581737704039 (list; graph; listen)
OFFSET

7,2
LINKS

Tomas Oliveira e Silva, Enumeration of polyominoes

CROSSREFS

Adjacent sequences: A057415 A057416 A057417 this_sequence A057419 A057420 A057421

Sequence in context: A129552 A056338 A056328 this_sequence A001419 A081152 A033116

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Sep 05 2000

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Last modified November 8 07:45 EST 2009. Contains 166143 sequences.

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