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A067111
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Floor[ Product of first n primes / Sum of first n primes].
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2
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1, 1, 3, 12, 82, 732, 8801, 125970, 2230928, 50152660, 1253503063, 37668721496, 1278362451795, 46557869507722, 1874663971306376, 85535849021496180, 4369909886714119634, 234108545627558824317, 13835073153310329323730
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OFFSET
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1,3
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LINKS
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FORMULA
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EXAMPLE
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a(4) = floor(2*3*5*7/17) = floor(210/17) = 12.
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MATHEMATICA
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Table[ Floor[ Product[ Prime[i], {i, 1, n} ] / Sum[ Prime[i], {i, 1, n} ]], {n, 1, 22} ]
Module[{nn=20, p, pr, sm}, p=Prime[Range[nn]]; pr=FoldList[Times, p]; sm=Accumulate[p]; Floor[ pr/sm]] (* Harvey P. Dale, Sep 01 2023 *)
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PROG
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(PARI) { t=1; s=0; for (n=1, 100, p=prime(n); t*=p; s+=p; write("b067111.txt", n, " ", floor(t/s)) ) } \\ Harry J. Smith, May 23 2010
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CROSSREFS
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KEYWORD
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easy,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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