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!)
A197466 Number of one-sided poly-[4.8^2]-tiles (holes allowed) with n cells (division into triangles is significant). 2
1, 2, 3, 8, 14, 36, 80, 206, 494, 1259, 3144, 8085, 20676, 53635, 139144, 363630, 952148, 2504626, 6603367, 17463287 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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..20.

CROSSREFS

Cf. A197465, A197467.

Sequence in context: A298343 A201361 A129700 * A049344 A080877 A007165

Adjacent sequences:  A197463 A197464 A197465 * A197467 A197468 A197469

KEYWORD

hard,nonn

AUTHOR

Joseph Myers, Oct 15 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 June 5 01:27 EDT 2020. Contains 334828 sequences. (Running on oeis4.)