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A058255
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Distinct values of lcm_{i=1..n} (p(i)-1), where p() are the primes.
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4
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1, 2, 4, 12, 60, 240, 720, 7920, 55440, 1275120, 16576560, 480720240, 19709529840, 39419059680, 197095298400, 3350620072800, 177582863858400, 532748591575200, 19711697888282400, 59135093664847200
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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For p = 29, 31, 37, 41, 43 these LCMs are equal to 55440 = 11*7! = lcm[1, 2, 4, 6, 10, 12, 16, 22, 28, 30, 36, 40, 42] = lcm[1, 2, 4, 6, 10, 12, 16, 22, 28]. The values was put on the stage only once. Repetitions skipped.
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MATHEMATICA
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Union@ Table[LCM @@ (Prime@ Range[1, n] - 1), {n, 38}] (* Michael De Vlieger, Dec 06 2018 *)
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CROSSREFS
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Cf. A095366 (least k > 1 such that k divides 1^n + 2^n + ... + (k-1)^n).
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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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