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 A138603 Numbers n such that 2^(2*n-43)-43 is prime. 0
 22, 24, 36, 60, 1678 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 2^(2*36-43)-43=536870869, 2^(2*60-43)-43=151115727451828646838229, ... MATHEMATICA q=43; For[i=q, i<=q, a={}; Do[x=2^(2*n-i)-i; If[PrimeQ[x], AppendTo[a, n]], {n, 13^3}]; Print["2^(2*n-", i, ")-", i, " ", a]; i=i+2] Select[Range[1680], PrimeQ[2^(2#-43)-43]&] (* Harvey P. Dale, Apr 25 2020 *) PROG (PARI) is(n)=isprime(2^(2*n-43)-43) \\ Charles R Greathouse IV, Jun 13 2017 CROSSREFS Sequence in context: A030593 A235807 A244397 * A181454 A155911 A061411 Adjacent sequences:  A138600 A138601 A138602 * A138604 A138605 A138606 KEYWORD nonn,easy AUTHOR Vladimir Joseph Stephan Orlovsky, May 13 2008 STATUS approved

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Last modified January 21 22:25 EST 2021. Contains 340359 sequences. (Running on oeis4.)