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A085272
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a(n) = lcm_{k=1..n} (prime(k) + 1).
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1
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3, 12, 12, 24, 24, 168, 504, 2520, 2520, 2520, 10080, 191520, 191520, 2106720, 2106720, 6320160, 6320160, 195924960, 3330724320, 3330724320, 123236799840, 123236799840, 123236799840, 123236799840, 862657598880, 862657598880
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(6) = lcm(2+1, 3+1, 5+1, 7+1, 11+1, 13+1} = lcm(3, 2^2, 2*3, 2^3, 3*2^2, 2*7) = 7*3*2^3 = 168.
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PROG
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(PARI) a(n) = lcm(vector(n, k, prime(k)+1)); \\ Michel Marcus, Mar 15 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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