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A072043
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a(n) = a(n-1)*a(n-2)*a(n-3)*(1+1/(n-3)), a(1)=a(2)=a(3)=1.
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0
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1, 1, 1, 2, 3, 8, 60, 1728, 967680, 114661785600, 215698302044209152000, 26592225368515593301597083402240000000, 723457119656730571214801208759677424070060705650559470796800000000000
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OFFSET
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1,4
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LINKS
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MATHEMATICA
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a[1] = a[2] = a[3] = 1; a[n_] := a[n - 1]*a[n - 2]*a[n - 3]*(1 + 1/(n - 3)); Table[ a[n], {n, 1, 13}]
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CROSSREFS
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KEYWORD
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easy,nonn,changed
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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