OFFSET
1,6
LINKS
Ed Wynn, Exhaustive generation of Mrs Perkins's quilt square dissections for low orders, arXiv:1308.5420
EXAMPLE
For n = 6 there are a(6) = 4 ways:
+-+-+-+ +-+-+-+ +-+---+ +---+-+
| | | | | | | | | | | | | |
+-+-+-+ +-+-+-+ +-+ | | +-+
| | | | | | | | | | | |
+-+ | | +-+ +-+-+-+ +-+-+-+
| | | | | | | | | | | | | |
+-+---+ +---+-+ +-+-+-+ +-+-+-+
CROSSREFS
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