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Search: id:A089989
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| A089989 |
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5^(n^2+2n+1)*Product_{j=1..n} (25^j-1). |
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+0
7
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| 5, 15000, 29250000000, 35703281250000000000, 27239372138671875000000000000000, 12988743471794208526611328125000000000000000000, 3870947187719439049405530095100402832031250000000000000000000000, 721020100095350865678782984846420731628313660621643066406250000000000000000000000000
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OFFSET
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0,1
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COMMENT
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The order of the p-Clifford group for an odd prime p is a*p^(n^2+2n+1)*Product_{j=1..n} (p^(2*j)-1), where a = gcd(p+1,4).
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LINKS
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G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.
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CROSSREFS
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Cf. A001309, A003956.
Cf. A092299 and A092301 (p=3), A092300 and A089989 (p=5), A090768 and A090769 (p=7), A090770 (p=2, although this is the wrong formula in that case).
Sequence in context: A109514 A022918 A058051 this_sequence A083976 A013834 A055380
Adjacent sequences: A089986 A089987 A089988 this_sequence A089990 A089991 A089992
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KEYWORD
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nonn
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AUTHOR
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njas, Feb 10 2004
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