1,2
CRC Handbook of Combinatorial Designs, 1996, p. 483.
Sequence in context: A124195 A079584 A179291 * A096494 A116568 A061106
Adjacent sequences: A004076 A004077 A004078 * A004080 A004081 A004082
nonn,hard
N. J. A. Sloane (njas(AT)research.att.com).