Search: id:A048615
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%I A048615
%S A048615 1,1,1,27,127,34603,278617
%N A048615 Numerator of mass (Sum 1/|Aut(H)|) of Hadamard matrices of order 4n.
%e A048615 1/192, 1/21504, 1/190080, 27/573440, ...
%Y A048615 Cf. A048616, A007299, A036297.
%Y A048615 Sequence in context: A044359 A044740 A026917 this_sequence A124955 A126414 
               A066414
%Y A048615 Adjacent sequences: A048612 A048613 A048614 this_sequence A048616 A048617 
               A048618
%K A048615 frac,nonn,hard,nice
%O A048615 1,4
%A A048615 N. J. A. Sloane (njas(AT)research.att.com), E. M. Rains

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