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 A138577 Numbers n such that 2^(2*n-3)-3 is prime. 0
 3, 4, 6, 16, 108, 112, 118, 274, 346, 1162, 1620 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 2^(2*3-3)-3=5, 2^(2*4-3)-3=29, 2^(2*6-3)-3=509,... MATHEMATICA q=3; For[i=q, i<=q, a={}; Do[x=2^(2*n-i)-i; If[PrimeQ[x], AppendTo[a, n]], {n, 10^2}]; Print["2^(2*n-", i, ")-", i, " ", a]; i=i+2] Select[Range[400], PrimeQ[2^(2#-3)-3]&] (* Harvey P. Dale, Aug 10 2017 *) PROG (PARI) is(n)=isprime(2^(2*n-3)-3) \\ Charles R Greathouse IV, Jun 13 2017 CROSSREFS Sequence in context: A092933 A122849 A068573 * A298149 A136242 A066732 Adjacent sequences:  A138574 A138575 A138576 * A138578 A138579 A138580 KEYWORD nonn,easy AUTHOR Vladimir Joseph Stephan Orlovsky, May 13 2008 EXTENSIONS More terms from Harvey P. Dale, Aug 10 2017 STATUS approved

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Last modified June 26 01:42 EDT 2022. Contains 354870 sequences. (Running on oeis4.)