A221841 Number of ways to dissect a square into n squares up to symmetry.
1, 0, 0, 1, 0, 1, 2, 6, 16, 56, 183, 657, 2277, 8813, 34178, 137578, 558734, 2285694
Offset: 1
Examples
For n = 7 there are a(7) = 2 ways: +---+---+ +---+---+ | | | | | | | | | | | | | | | | | | +-+-+-+-+ +---+-+-+ | | | | | | | | +-+ +-+ | +-+-+ | | | | | | | | +-+---+-+ +---+-+-+
Links
- Ed Wynn, Exhaustive generation of Mrs Perkins's quilt square dissections for low orders, 2013, arXiv:1308.5420
Extensions
a(10) corrected (thanks to Ed Wynn) by Geoffrey H. Morley, Aug 02 2013
More terms from Wynn, 2013. - N. J. A. Sloane, Nov 29 2013