Search: id:A027638
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%I A027638
%S A027638 4,96,46080,371589120,48514675507200,101643290713836748800,
%T A027638 3409750224676138896064512000,1830483982118721406049481526345728000,
%U A027638 15723497752907010191583185709179507111362560000
%N A027638 Order of 2^n X 2^n unitary group H_n acting on Siegel modular forms.
%D A027638 B. Runge, On Siegel modular forms I, J. Reine Angew. Math., 436 (1993), 
               57-85.
%D A027638 B. Runge, Codes and Siegel modular forms, Discrete Math. 148 (1996), 
               175-204.
%H A027638 <a href="Sindx_Gre.html#groups_modular">Index entries for sequences related 
               to modular groups</a>
%p A027638 2^(n^2+2*n+2)*product(4^'i'-1,'i'=1..n);
%Y A027638 Equals A003956/2. Cf. A027672.
%Y A027638 Sequence in context: A146514 A098695 A059201 this_sequence A041275 A024384 
               A091268
%Y A027638 Adjacent sequences: A027635 A027636 A027637 this_sequence A027639 A027640 
               A027641
%K A027638 nonn,easy,nice
%O A027638 0,1
%A A027638 N. J. A. Sloane (njas(AT)research.att.com).

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