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Search: id:A027638
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| A027638 |
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Order of 2^n X 2^n unitary group H_n acting on Siegel modular forms. |
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+0
4
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| 4, 96, 46080, 371589120, 48514675507200, 101643290713836748800, 3409750224676138896064512000, 1830483982118721406049481526345728000, 15723497752907010191583185709179507111362560000
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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B. Runge, On Siegel modular forms I, J. Reine Angew. Math., 436 (1993), 57-85.
B. Runge, Codes and Siegel modular forms, Discrete Math. 148 (1996), 175-204.
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LINKS
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Index entries for sequences related to modular groups
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MAPLE
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2^(n^2+2*n+2)*product(4^'i'-1, 'i'=1..n);
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CROSSREFS
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Equals A003956/2. Cf. A027672.
Adjacent sequences: A027635 A027636 A027637 this_sequence A027639 A027640 A027641
Sequence in context: A027872 A098695 A059201 this_sequence A041275 A024384 A091268
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KEYWORD
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nonn,easy,nice
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AUTHOR
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njas
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