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Search: id:A057419
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A057419 Number of fixed n-celled polyominoes with 1 hole. +0
1
4, 41, 272, 1516, 7688, 36726, 168528, 751742, 3284460, 14127796, 60040812, 252749460, 1055898224, 4383854044, 18107682684, 74474755264, 305200110920, 1246872556159, 5080537687912, 20653896398652 (list; graph; listen)
OFFSET

7,1
LINKS

Tomas Oliveira e Silva, Enumeration of polyominoes

CROSSREFS

Adjacent sequences: A057416 A057417 A057418 this_sequence A057420 A057421 A057422

Sequence in context: A068169 A069631 A069616 this_sequence A089664 A089454 A109109

KEYWORD

nonn

AUTHOR

njas, Sep 05 2000

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

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