A120646 Number of 2-anisohedral polyominoes of order n.

0, 0, 0, 0, 0, 0, 0, 1, 8, 41, 89, 214, 406, 874, 1107, 2210, 1316, 7380, 5450, 18211, 21866, 47702, 10390, 201834, 28784

Offset

1,9

Links

Table of n, a(n) for n=1..25.

Joseph Myers, Polyomino tiling

Crossrefs

Sequence in context: A209829 A209848 A093104 * A041116 A326286 A250322

Adjacent sequences: A120643 A120644 A120645 * A120647 A120648 A120649

Keyword

nonn

Author

N. J. A. Sloane, Aug 18 2006

Extensions

Adjusted to offset 1 and a(24) and a(25) added by Joseph Myers, Nov 17 2010

Status

approved