1,1

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

Sequence in context: A040272 A062054 A164008 this_sequence A044857 A161440 A044902

Adjacent sequences: A013574 A013575 A013576 this_sequence A013578 A013579 A013580

nonn,hard

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