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%I #16 Nov 29 2013 13:35:24
%S 1,0,0,1,0,1,2,6,16,56,183,657,2277,8813,34178,137578,558734,2285694
%N Number of ways to dissect a square into n squares up to symmetry.
%H Ed Wynn, <a href="http://arxiv.org/abs/1308.5420">Exhaustive generation of Mrs Perkins's quilt square dissections for low orders</a>, 2013, arXiv:1308.5420
%e For n = 7 there are a(7) = 2 ways:
%e +---+---+ +---+---+
%e | | | | | |
%e | | | | | |
%e | | | | | |
%e +-+-+-+-+ +---+-+-+
%e | | | | | | | |
%e +-+ +-+ | +-+-+
%e | | | | | | | |
%e +-+---+-+ +---+-+-+
%Y Cf. A221840, A221842.
%K nonn,nice,more
%O 1,7
%A _Geoffrey H. Morley_, Jan 26 2013
%E a(10) corrected (thanks to _Ed Wynn_) by _Geoffrey H. Morley_, Aug 02 2013
%E More terms from Wynn, 2013. - _N. J. A. Sloane_, Nov 29 2013