OFFSET
1,4
LINKS
Christopher Hunt Gribble, C++ program for A226978, A226979, A226980, A226981, A227004
Ed Wynn, Exhaustive generation of Mrs Perkins's quilt square dissections for low orders, arXiv:1308.5420
FORMULA
EXAMPLE
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Christopher Hunt Gribble, Jun 25 2013
EXTENSIONS
a(8)-a(12) from Ed Wynn, Apr 01 2014
STATUS
approved