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

Author

Joseph Myers, Oct 10 2011

Keywords

• hard
• nonn

References

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

Crossrefs

Cf. A197159.

Extensions

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