1,1

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

Sequence in context: A008074 A008190 A008193 this_sequence A009904 A008215 A008232

Adjacent sequences: A010894 A010895 A010896 this_sequence A010898 A010899 A010900

nonn,hard

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