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A161672
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Half the product of all numbers from A141468(n) up to prime(n).
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1
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0, 3, 10, 21, 3960, 77220, 490089600, 1523733120, 2075793350400, 50710801232931840000, 3144069676441774080000, 19348101737674447004467200000, 137500509682406403378413568000000
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OFFSET
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1,2
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LINKS
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FORMULA
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a(n) = prime(n)!/ (2*(A141468(n)-1)!).
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EXAMPLE
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a(1)=0 is the product 0*1*2/2. a(2) is the product 1*2*3/2 = 3. a(3)=10 is the product 4*5/2.
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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