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A134702
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Initial prime, greater than 5, of a prime chain of length n under the iteration x->2x-5.
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1
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7, 11, 11, 11, 11, 11, 11, 11, 29614931, 29614931, 1172182334669, 67667595358511, 124204021800149
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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(3) = 11 because 11 11*2-5=17 and 17*2-5=29 are primes.
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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