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%I #6 Mar 30 2012 16:52:09
%S 7,12,13,20,21,26,30,31,35,50,56,57,63,70,72,73,82,90,91,99,100,111,
%T 117,130,132,133,143,155,176,182,183,190,195,196,208,221,222,247,255,
%U 272,273,301,304,305,306,307,324,330,336,357,371,380,381,392,407,425,438,475,484
%N List of values of n for which there exist block designs with n blocks.
%C I don't know how far it has been verified that there are no missing entries in this list.
%D Abbott, H. L.; and Hare, D. R.; The set of values of b for which there exist block designs with b blocks. Discrete Math. 290 (2005), no. 2-3, 275-282.
%K nonn
%O 1,1
%A _N. J. A. Sloane_, Jan 31 2012
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