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!)
A151515 Number of 1-sided strip polyhexes with n cells. 0
1, 1, 2, 6, 15, 44, 121, 353, 1005, 2919, 8398, 24310, 70064, 202225, 582365, 1676889, 4821924, 13857720, 39787804 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..19.

Ed Pegg, Jr., Illustrations of polyforms

Eric Weisstein's World of Mathematics, Polyhex

CROSSREFS

Sequence in context: A303833 A148438 A148439 * A264746 A052870 A293743

Adjacent sequences:  A151512 A151513 A151514 * A151516 A151517 A151518

KEYWORD

nonn,hard,more

AUTHOR

Ed Pegg Jr, May 13 2009

EXTENSIONS

a(13)-a(19) from Joseph Myers, Nov 26 2010

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 August 11 09:30 EDT 2020. Contains 336423 sequences. (Running on oeis4.)