A240121 Number of inequivalent ways to cut an n X n square into squares with integer sides, such that the dissection has two reflective symmetries in axes parallel to the sides, and no other reflective symmetries.

0, 0, 0, 1, 0, 13, 5, 183, 75, 4408, 1501, 180324

Offset: 1

Author

Ed Wynn, Apr 01 2014

Keywords

• nonn
• more

Comments

The two reflective symmetries imply 180-degree (but not 90-degree) rotational symmetry.

Examples

			This dissection is the only example for n=4:
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Links

• Ed Wynn, Exhaustive generation of Mrs Perkins's quilt square dissections for low orders, arXiv:1308.5420

Crossrefs

Cf. A226979, A045846, A224239, A240120, A240122.