A197160 Number of fixed poly-[3^4.6]-tiles (holes allowed) with n cells.

6, 15, 44, 141, 480, 1703, 6216, 23136, 87334, 333309, 1283706, 4982458, 19466130, 76479612, 301923554, 1196919714, 4762524162, 19012433694

Offset

1,1

References

Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 2.7, 6.2 and 9.4.

Links

Table of n, a(n) for n=1..18.

Crossrefs

Cf. A197159.

Sequence in context: A137806 A193449 A378796 * A182420 A117961 A327769

Adjacent sequences: A197157 A197158 A197159 * A197161 A197162 A197163

Keyword

hard,nonn

Author

Joseph Myers, Oct 10 2011

Extensions

a(16)-a(18) from Johann Peters, Dec 17 2024

Status

approved