13,25
CRC Handbook of Combinatorial Designs, 1996, p. 286.
Sequence in context: A134414 A113036 A000425 this_sequence A000171 A054922 A061848
Adjacent sequences: A010890 A010891 A010892 this_sequence A010894 A010895 A010896
nonn,hard
N. J. A. Sloane (njas(AT)research.att.com).
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