cp's OEIS Frontend

A221842 Number of ways to dissect a square into n squares.

%I A221842 #18 Feb 07 2014 04:08:00
%S A221842 1,0,0,1,0,4,8,36,105,384,1340,4975,17676,69052,270716,1093218,
%T A221842 4455047,18246018
%N A221842 Number of ways to dissect a square into n squares.
%H A221842 Ed Wynn, <a href="http://arxiv.org/abs/1308.5420">Exhaustive generation of Mrs Perkins's quilt square dissections for low orders</a>, arXiv:1308.5420
%e A221842 For n = 6 there are a(6) = 4 ways:
%e A221842 +-+-+-+   +-+-+-+   +-+---+   +---+-+
%e A221842 | | | |   | | | |   | |   |   |   | |
%e A221842 +-+-+-+   +-+-+-+   +-+   |   |   +-+
%e A221842 | |   |   |   | |   | |   |   |   | |
%e A221842 +-+   |   |   +-+   +-+-+-+   +-+-+-+
%e A221842 | |   |   |   | |   | | | |   | | | |
%e A221842 +-+---+   +---+-+   +-+-+-+   +-+-+-+
%Y A221842 Cf. A221841.
%K A221842 nonn,more
%O A221842 1,6
%A A221842 _Geoffrey H. Morley_, Jan 26 2013
%E A221842 a(10) corrected (thanks to _Ed Wynn_) by _Geoffrey H. Morley_, Aug 02 2013
%E A221842 More terms from Wynn, 2013. - _N. J. A. Sloane_, Nov 29 2013