1,1

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

Sequence in context: A111354 A106675 A022946 this_sequence A045376 A045377 A141777

Adjacent sequences: A010892 A010893 A010894 this_sequence A010896 A010897 A010898

nonn,hard

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