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Search: id:A158817
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| A158817 |
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a(n) = (Binomial(2^n,2^{n-1})-Binomial(2^{n-1},2^{n-2})/2^n |
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+0
1
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| 1, 8, 800, 18783360, 28634752192836096, 187118328452563147377366903401859072, 22533823529098462258163079522899558155141642796614195116180863201125539840
(list; graph; listen)
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OFFSET
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2,2
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REFERENCES
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Katona, Gyula O. H.; Makar-Limanov, Leonid A problem for abelian groups. Asian-Eur. J. Math. 1 (2008), no. 2, 237--241. (Reviewer: Thomas Britz) 20K01 (05B40 94B65)
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MATHEMATICA
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Flatten[Table[(Binomial[2^n, 2^{n - 1}] - Binomial[2^{n - 1}, 2^{n - 2}])/ 2^n, {n, 2, 10}]]
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CROSSREFS
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Sequence in context: A145415 A001547 A054945 this_sequence A159707 A097818 A027725
Adjacent sequences: A158814 A158815 A158816 this_sequence A158818 A158819 A158820
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KEYWORD
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nonn
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AUTHOR
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Tanya Khovanova & Leonid Makar-Limanov (tanyakh(AT)yahoo.com), Mar 27 2009
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