OFFSET
0,2
LINKS
G. Kuperberg, Symmetry classes of alternating-sign matrices under one roof, arXiv:math/0008184 [math.CO], 2000-2001. [A_{UU}(4n)]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paul Zinn-Justin, May 16 2007, Jun 04 2007
STATUS
approved