OFFSET
1,4
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = round(hypergeometric([-n/2+1/2, -n/2+1], [3/2], 1)). - Peter Luschny, Sep 18 2014
MATHEMATICA
Table[Floor[2^(n-1)/n + 1/2], {n, 40}] (* Harvey P. Dale, Jul 20 2011 *)
PROG
(Magma) [Floor(2^(n-1)/n + 1/2): n in [1..45]]; // Vincenzo Librandi, Jul 21 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Apr 17 2000
STATUS
approved