1,1

D. P. Robbins, Symmetry classes of alternating sign matrices, arXiv:math.CO/0008045

Sequence in context: A132228 A151879 A154828 this_sequence A145157 A079503 A052694

Adjacent sequences: A057626 A057627 A057628 this_sequence A057630 A057631 A057632

nonn,nice,more

N. J. A. Sloane (njas(AT)research.att.com), Oct 10 2000