%I A028308
%S A028308 1,6,48,4320,46448640,10835538739200000
%N A028308 Form a triangle with n numbers in top row; all other numbers are the 
               product of their parents. E.g.: 4 2 3 5; 8 6 15; 48 90; 4320. The 
               numbers must be positive and distinct and the final number is to 
               be minimized.
%H A028308 <a href="http://www.mathpro.com/math/archive/RusMath.txt">Problem 401 
               here suggested this sequence</a>
%e A028308 Solutions for n=1,2,... are 1; 2 3; 3 2 4; 4 2 3 5; 5 3 2 4 7
%Y A028308 A less interesting cousin of A028307.
%Y A028308 Sequence in context: A108092 A052744 A084259 this_sequence A061429 A048357 
               A027766
%Y A028308 Adjacent sequences: A028305 A028306 A028307 this_sequence A028309 A028310 
               A028311
%K A028308 nonn
%O A028308 1,2
%A A028308 N. J. A. Sloane (njas(AT)research.att.com).