A121309 Number of 3-anisohedral polyiamonds of order n.

0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 8, 8, 9, 7, 13, 16, 16, 17, 25, 125, 32, 43, 34, 121, 46, 62, 57, 113, 59, 2881

Offset

1,11

Links

Table of n, a(n) for n=1..30.

Joseph Myers, Polyomino tiling

Crossrefs

Sequence in context: A193781 A200492 A154707 * A020785 A090654 A181673

Adjacent sequences: A121306 A121307 A121308 * A121310 A121311 A121312

Keyword

nonn

Author

N. J. A. Sloane, Aug 25 2006

Extensions

Adjusted to offset 1 and a(29) and a(30) added by Joseph Myers, Nov 21 2010

Status

approved