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A221842
Number of ways to dissect a square into n squares.
1
1, 0, 0, 1, 0, 4, 8, 36, 105, 384, 1340, 4975, 17676, 69052, 270716, 1093218, 4455047, 18246018
OFFSET
1,6
EXAMPLE
For n = 6 there are a(6) = 4 ways:
+-+-+-+ +-+-+-+ +-+---+ +---+-+
| | | | | | | | | | | | | |
+-+-+-+ +-+-+-+ +-+ | | +-+
| | | | | | | | | | | |
+-+ | | +-+ +-+-+-+ +-+-+-+
| | | | | | | | | | | | | |
+-+---+ +---+-+ +-+-+-+ +-+-+-+
CROSSREFS
Cf. A221841.
Sequence in context: A354735 A149111 A149112 * A100214 A229535 A309618
KEYWORD
nonn,more
AUTHOR
Geoffrey H. Morley, Jan 26 2013
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
STATUS
approved