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(GAP) Filtered([0..200], k-> IsPrime(2*k+19) ) ; # G. C. Greubel, May 22 2019
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Nonnegative numbers n k such that 2n 2k + 19 is prime.
For n k = 4, 2*nk+19 = 27 is not prime, so 4 is not in the sequence; for n = 17, 2*n+19 = 53 is prime, so 17 is in the sequence.
for k = 17, 2*k+19 = 53 is prime, so 17 is in the sequence.
Solutions of the equation (2*n+19)' = 1, where n' is the arithmetic derivative of n. - Paolo P. Lava, Nov 15 2012
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(MAGMAMagma) [ n: n in [0..165] | IsPrime(2*n+19) ];