1,1

CRC Handbook of Combinatorial Designs, 1996, p. 315.

Sequence in context: A127852 A064027 A028878 this_sequence A135446 A160002 A027177

Adjacent sequences: A010893 A010894 A010895 this_sequence A010897 A010898 A010899

nonn,hard

N. J. A. Sloane (njas(AT)research.att.com).