0,2
T. Y. Chow, H. Eriksson and C. K. Fan, Chess tableaux, Elect. J. Combin., 11 (2) (2005), #A3.
Sequence in context: A001137 A123593 A122748 * A063402 A175195 A139800
Adjacent sequences: A108771 A108772 A108773 * A108775 A108776 A108777
nonn
N. J. A. Sloane (njas(AT)research.att.com), Jun 27 2005