5,2

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Gordon Royle, personal communication.

CRC Handbook of Combinatorial Designs, 1996, p. 647.

Sequence in context: A063075 A112541 A052667 this_sequence A005867 A079802 A009741

Adjacent sequences: A006922 A006923 A006924 this_sequence A006926 A006927 A006928

nonn

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