A197960 Number of free poly-IH15-tiles (polydrops) (holes allowed) with n cells.

1, 3, 7, 28, 98, 432, 1846, 8455, 38764, 181840, 858387, 4093460, 19635210, 94757550

Offset

1,2

References

Branko Gruenbaum 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.

Brendan Owen, Polydrops (gives a(1)-a(10))

Crossrefs

Cf. A197958.

Sequence in context: A148757 A148758 A054277 * A197959 A197550 A289605

Adjacent sequences: A197957 A197958 A197959 * A197961 A197962 A197963

Keyword

hard,nonn

Author

Joseph Myers, Oct 19 2011

Status

approved