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A027639
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Order of unitary 2^n X 2^n group H_{n,4} acting on Siegel modular forms.
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1
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4, 32, 3072, 2752512, 21139292160, 1342091380654080, 692647993190048071680, 2882479558988139892026900480, 96342151992701835341576224427212800, 25811138467998276182105365247324712232550400
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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REFERENCES
| 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
| Index entries for sequences related to modular groups
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MAPLE
| 2^(n^2+2*n+2)*product(2^'i'-1, 'i'=1..n);
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CROSSREFS
| Cf. A027639.
Sequence in context: A081790 A053005 A012092 * A117620 A059904 A145645
Adjacent sequences: A027636 A027637 A027638 * A027640 A027641 A027642
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KEYWORD
| nonn,nice,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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