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Search: id:A059846
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| A059846 |
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Smallest p primes which give q=2p+2n-1 primes. Smallest Sophie Germain primes generalized in a possible way: 1 is replaced by 2n-1. |
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2
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| 2, 7, 31, 71, 59, 331, 569, 263, 691, 977, 1091, 2089, 1487, 2417, 2797, 10223, 4987, 6427, 12743, 9811, 17041, 29423, 12739, 20323, 20147, 17839, 53017, 53693, 17033, 67261, 151169, 106357, 129517, 185153, 77969, 253609, 185477, 140717
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OFFSET
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0,1
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FORMULA
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Min{p|p and q=2p+2n-1 are primes}
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EXAMPLE
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For n=1,2,3,4, 2n-1=1,3,5,7 and 2*{2,7,31,71,..}+{1,3,5,7,...}={5,17,67,149,..}. For n=75, a(75)=140717 a prime gives 2*140717+75=281509, a new prime.
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CROSSREFS
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Cf. A005384, A005385, A059847.
Sequence in context: A049576 A158713 A102162 this_sequence A034698 A115605 A114198
Adjacent sequences: A059843 A059844 A059845 this_sequence A059847 A059848 A059849
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Feb 26 2001
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