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A089456 Number of n-celled polyominoes with exactly 4 holes. 4
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 179, 2509, 25609, 214932, 1578984, 10536260, 65411645, 383981499, 2156114468 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,17

LINKS

Table of n, a(n) for n=1..26.

Tomás Oliveira e Silva, Animal enumerations on the {4,4} Euclidean tiling

CROSSREFS

Cf. A001419, A057418, A089454, A089455, A089457, A089458.

Sequence in context: A001596 A221115 A159326 * A108552 A221589 A060593

Adjacent sequences:  A089453 A089454 A089455 * A089457 A089458 A089459

KEYWORD

hard,nonn

AUTHOR

Joseph Myers, Nov 04 2003

STATUS

approved

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Last modified May 25 01:01 EDT 2017. Contains 287008 sequences.