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A240122
Number of inequivalent ways to cut an n X n square into squares with integer sides, such that the dissection has 90-degree rotational symmetry and no reflective symmetry
3
0, 0, 0, 0, 1, 2, 12, 40, 154, 760, 3260, 22730
OFFSET
1,6
EXAMPLE
The two dissections for n=6:
------------- -------------
| | | | | | | | | | | |
--- ------- --- -------
| | | | | | | | | |
--------- | --------- |
| | | | | | | | | | |
----- ----- -------------
| | | | | | | | | | |
| --------- ---------
| | | | | | | | | |
------- --- ------- ---
| | | | | | | | | | | |
------------- -------------
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Ed Wynn, Apr 01 2014
STATUS
approved