%I A006185 M3266
%S A006185 1,4,6,7,7,12,12,19,21,26
%N A006185 Number of pair-coverings with largest block size 3.
%D A006185 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A006185 R. G. Stanton, J. L. Allston and D. D. Cowan, Pair-coverings with restricted 
               largest block length, Ars Combin., 11 (1981), 85-98.
%Y A006185 Sequence in context: A019605 A000703 A011275 this_sequence A021876 A005670 
               A123860
%Y A006185 Adjacent sequences: A006182 A006183 A006184 this_sequence A006186 A006187 
               A006188
%K A006185 nonn
%O A006185 3,2
%A A006185 N. J. A. Sloane (njas(AT)research.att.com).