A057426 Number of asymmetric n-celled polyominoes with 1 hole.

0, 0, 0, 0, 0, 0, 0, 5, 31, 185, 947, 4564, 21004, 93833, 410295, 1765378, 7504024, 31591157, 131982937, 547971412, 2263443059, 9309302775, 38149945673, 155858903955, 635066943350, 2581736396181

Offset

1,8

Links

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

Tomás Oliveira e Silva, Enumeration of polyominoes

Crossrefs

Cf. A056884.

Sequence in context: A078526 A255236 A202753 * A329014 A015540 A014987

Adjacent sequences: A057423 A057424 A057425 * A057427 A057428 A057429

Keyword

nonn

Author

N. J. A. Sloane, Sep 05 2000

Status

approved