login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A197160 Number of fixed poly-[3^4.6]-tiles (holes allowed) with n cells. 1
6, 15, 44, 141, 480, 1703, 6216, 23136, 87334, 333309, 1283706, 4982458, 19466130, 76479612, 301923554 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Branko Gr├╝nbaum 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..15.

CROSSREFS

Cf. A197159.

Sequence in context: A272320 A137806 A193449 * A182420 A117961 A327769

Adjacent sequences:  A197157 A197158 A197159 * A197161 A197162 A197163

KEYWORD

hard,nonn

AUTHOR

Joseph Myers, Oct 10 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 12 07:28 EDT 2021. Contains 343821 sequences. (Running on oeis4.)