|
| |
|
|
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
|
N. J. A. Sloane
|
|
|
EXTENSIONS
|
One more term (a(9)) from Harvey P. Dale, Aug 20 2019
|
|
|
STATUS
|
approved
|
| |
|
|
