A240125 Number of inequivalent ways to cut an n X n square into squares with integer sides, such that the dissection has one reflective symmetry in an axis parallel to a side, but no other symmetries.
0, 0, 0, 3, 5, 138, 201, 13032, 19990, 4095612, 7026883, 4451051502
Offset: 1
Examples
The three dissections for n=4, with the axis horizontal: --------- --------- --------- | | | | | | | | | | | | | | ----- | ----- --------- | | | | | | | | | | | --------- ----- | | ----- | | | | | | | | | | | | ----- | ----- --------- | | | | | | | | | | | | | --------- --------- ---------
Links
- Ed Wynn, Exhaustive generation of Mrs Perkins's quilt square dissections for low orders, arXiv:1308.5420