login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A171012 Number of ways to place two non-attacking wazirs on all free n-ominoes. 0
0, 0, 2, 14, 71, 341, 1591, 7610, 35432, 165209 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
EXAMPLE
E.g. the triomino XXX admits 1 combination of 2 non-attacking wazirs.
The triomino XX admits 1 combination of 2 non-attacking wazirs.
............ X
CROSSREFS
Sequence in context: A206947 A203241 A072888 * A094583 A002058 A095933
KEYWORD
nonn
AUTHOR
David Scambler, Aug 27 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)