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 A028369 a(n) = 2^(2^(n-1) + n - 2). 3
 1, 4, 32, 1024, 524288, 68719476736, 590295810358705651712, 21778071482940061661655974875633165533184, 14821387422376473014217086081112052205218558037201992197050570753012880593911808 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..12 FORMULA a(n) = 2^A052944(n-1). - R. J. Mathar, Dec 15 2015 MATHEMATICA Table[2^(2^(n-1)+n-2), {n, 10}] (* Harvey P. Dale, Aug 20 2019 *) PROG (Magma) [2^(n-1)*2^(2^(n-1)-1): n in [1..10]]; // Vincenzo Librandi, Jun 03 2011 (PARI) a(n)=1<<(2^(n-1)+n-2) \\ Charles R Greathouse IV, Jun 05 2011 CROSSREFS Sequence in context: A243918 A298896 A231991 * A081790 A053005 A257583 Adjacent sequences: A028366 A028367 A028368 * A028370 A028371 A028372 KEYWORD nonn,easy AUTHOR EXTENSIONS One more term (a(9)) from Harvey P. Dale, Aug 20 2019 STATUS approved

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Last modified February 6 04:21 EST 2023. Contains 360097 sequences. (Running on oeis4.)