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A051957
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a(n) = smallest number > a(n-1) such that a(1)*a(2)*...*a(n) - 1 is a prime.
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5
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3, 4, 5, 6, 8, 9, 11, 14, 18, 20, 21, 27, 28, 37, 62, 77, 86, 97, 100, 107, 109, 166, 167, 181, 196, 225, 262, 266, 268, 274, 278, 290, 305, 345, 378, 385, 414, 429, 438, 442, 498, 503, 516, 531, 573, 595, 596, 611, 640, 665, 749, 794, 870
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internal format)
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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seq={3}; Do[n=Last[seq]+1; While[!PrimeQ[n Times@@seq-1], n++]; AppendTo[ seq, n]; , {60}]; seq (* Harvey P. Dale, Oct 21 2011 *)
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CROSSREFS
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KEYWORD
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nice,nonn
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AUTHOR
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STATUS
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approved
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