3,2

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

R. G. Stanton, J. L. Allston and D. D. Cowan, Pair-coverings with restricted largest block length, Ars Combin., 11 (1981), 85-98.

Sequence in context: A019605 A000703 A011275 this_sequence A021876 A005670 A123860

Adjacent sequences: A006182 A006183 A006184 this_sequence A006186 A006187 A006188

nonn

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