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A105760
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Nonnegative numbers k such that 2k+7 is prime.
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32
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0, 2, 3, 5, 6, 8, 11, 12, 15, 17, 18, 20, 23, 26, 27, 30, 32, 33, 36, 38, 41, 45, 47, 48, 50, 51, 53, 60, 62, 65, 66, 71, 72, 75, 78, 80, 83, 86, 87, 92, 93, 95, 96, 102, 108, 110, 111, 113, 116, 117, 122, 125, 128, 131, 132, 135, 137, 138, 143, 150, 152, 153, 155, 162
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OFFSET
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1,2
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LINKS
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EXAMPLE
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If n=0, then 2*0 + 7 = 7 (prime).
If n=15, then 2*15 + 7 = 37 (prime).
If n=27, then 2*27 + 7 = 61 (prime).
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MATHEMATICA
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PROG
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(Sage) [n for n in (0..200) if is_prime(2*n+7) ] # G. C. Greubel, May 21 2019
(GAP) Filtered([0..200], k-> IsPrime(2*k+7) ) # G. C. Greubel, May 21 2019
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CROSSREFS
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Cf. A153053 (Numbers n such that 2n+7 is not a prime)
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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