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Search: id:A092301
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| A092301 |
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3^(n^2+2n+1)*Product_{j=1..n} (9^j-1). |
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+0
7
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| 3, 648, 12597120, 20056328248320, 2589682730460637593600, 27088537289801063207068178841600, 22951765904242357263319251737033603284992000, 1575188025865853631043462731239785102397842258177032192000, 8756565436081269687990149660909266003169595871730647160978999995269120000
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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: A137126 A140029 A091261 this_sequence A059120 A013826 A133014
Adjacent sequences: A092298 A092299 A092300 this_sequence A092302 A092303 A092304
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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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