login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A075207 Number of polyhexes with n cells that tile the plane by translation. 10
1, 1, 3, 6, 12, 36, 60, 209, 387, 1054, 1468, 6895, 7001, 23920, 49496, 126732, 146046, 638800, 647502, 2772935, 4162861 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

Branko Gr├╝nbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Section 9.4.

LINKS

Table of n, a(n) for n=1..21.

Joseph Myers, Polyhex tiling

CROSSREFS

Cf. A070766, A075208, A075209, A075210, A075211, A075212, A075213, A075214, A075215, A075198, A075216.

Sequence in context: A033648 A102972 A075209 * A208131 A136121 A023369

Adjacent sequences:  A075204 A075205 A075206 * A075208 A075209 A075210

KEYWORD

hard,nonn

AUTHOR

Joseph Myers, Sep 08 2002

EXTENSIONS

More terms from Joseph Myers, Nov 08 2003

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), May 05 2007

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 October 22 22:34 EDT 2019. Contains 328335 sequences. (Running on oeis4.)