5,2

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: A074924 A064166 A107371 this_sequence A004234 A121149 A088770

Adjacent sequences: A006184 A006185 A006186 this_sequence A006188 A006189 A006190

nonn

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