A197959 Number of free poly-IH13-tiles (holes allowed) with n cells.

1, 3, 7, 28, 99, 433, 1852, 8463, 38797, 181888, 858560, 4093728, 19636098, 94758985

Offset

1,2

References

Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 6.2 and 9.4.

Links

Table of n, a(n) for n=1..14.

Crossrefs

Cf. A197958.

Sequence in context: A148758 A054277 A197960 * A197550 A289605 A361360

Adjacent sequences: A197956 A197957 A197958 * A197960 A197961 A197962

Keyword

hard,nonn

Author

Joseph Myers, Oct 19 2011

Status

approved