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A186969
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Smallest prime p such that k*p + k + 1 is prime for k=1..n.
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0
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3, 5, 5, 4259, 25409, 25409, 512819, 512819, 17733438029, 1095010766849, 766405913232959
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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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n=1: p=3 and p+2=5 both primes
n=2,3: p=5, p+2=7, 2*p+3=13, and 3*p+4=19 all four primes
n=4: p=4259, p+2=4261, 2*p+3=8521, 3*p+4=12781, and 4*p+5=17041 all five primes.
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CROSSREFS
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KEYWORD
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nonn,more,hard
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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