1,1
Table of n, a(n) for n=1..7.
2^(2*11-15)-15=113, 2^(2*19-15)-15=8388593, 2^(2*55-15)-15=39614081257132168796771975153, ...
q=15; 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]
(PARI) is(n)=isprime(2^(2*n-15)-15) \\ Charles R Greathouse IV, Jun 13 2017
Sequence in context: A297134 A247455 A280290 * A323062 A097363 A152870
Adjacent sequences: A138578 A138579 A138580 * A138582 A138583 A138584
nonn,easy
Vladimir Joseph Stephan Orlovsky, May 13 2008
approved
