A071332 Number of polyiamonds with n cells that tile the plane.

1, 1, 1, 3, 4, 12, 23, 66, 139, 341, 567, 2034, 2495, 6354, 12908, 30261, 26556, 110145, 95967, 377523, 499672, 788726, 845130, 4998370, 3694670, 7406217, 13175181, 33557076, 22381719, 117770863

Offset: 1

Author

Joseph Myers, May 19 2002

Keywords

• hard
• nonn

References

• M. Gardner, Tiling with Polyominoes, Polyiamonds and Polyhexes. Chap. 14 in Time Travel and Other Mathematical Bewilderments. New York: W. H. Freeman, pp. 175-187, 1988.

Links

• Joseph Myers, Polyiamond tiling

Crossrefs

Equals A000577-A071333 and equals A070765-A071334, cf. A054359, A070766.

Extensions

More terms from Joseph Myers, Nov 11 2003

a(29) and a(30) from Joseph Myers, Nov 21 2010