Search: id:A098694
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%I A098694
%S A098694 2,48,34560,1393459200,5056584744960000,2422112183371431936000000,
%T A098694 211155601241022491077587763200000000,
%U A098694 4417964278440225627098723475313498521600000000000
%N A098694 Double-superfactorials: Prod[k=1..n, (2k)! ].
%H A098694 C. Radoux, <a href="http://www.mat.univie.ac.at/~slc/opapers/s28radoux.html">
               Determinants de Hankel et theoreme de Sylvester</a>
%Y A098694 Cf. A000178.
%Y A098694 Sequence in context: A090770 A081960 A123742 this_sequence A137592 A057527 
               A166475
%Y A098694 Adjacent sequences: A098691 A098692 A098693 this_sequence A098695 A098696 
               A098697
%K A098694 nonn
%O A098694 1,1
%A A098694 Ralf Stephan, Sep 22 2004

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