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Search: id:A053601
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| A053601 |
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Bases of n-dimensional vector space over GF(2). |
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+0
5
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| 1, 1, 3, 28, 840, 83328, 27998208, 32509919232, 132640470466560, 1927943976061501440, 100981078400558897823744, 19242660536873338307044442112, 13448310596010038676027219703234560
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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a(n) = (2^n-1)(2^n-2)...(2^n-2^(n-1))/n!.
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EXAMPLE
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a(2)=3 because the 3 bases are {01,10}, {01,11}, {10,11}.
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CROSSREFS
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Cf. A002884.
Adjacent sequences: A053598 A053599 A053600 this_sequence A053602 A053603 A053604
Sequence in context: A084880 A110259 A015474 this_sequence A140990 A122891 A119156
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KEYWORD
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easy,nonn
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AUTHOR
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Fred Galvin (galvin(AT)math.ukans.edu), Jan 20 2000
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 05 2000
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