A121310 Number of 4-anisohedral polyiamonds of order n.

0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 1, 2, 0, 7, 1, 3, 5, 1, 4, 4, 6, 4, 13, 4, 17, 13, 8, 2, 20

Offset

1,11

Links

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

Joseph Myers, Polyomino tiling

Crossrefs

Sequence in context: A334873 A327359 A197522 * A356919 A278158 A218880

Adjacent sequences: A121307 A121308 A121309 * A121311 A121312 A121313

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