OFFSET
1,2
LINKS
Harry J. Smith, Table of n, a(n) for n = 1..200
MATHEMATICA
a[n_] := DivisorSigma[1, Binomial[n, Floor[n/2]]]; Array[a, 32] (* Amiram Eldar, Apr 01 2024 *)
PROG
(PARI) a(n) = sigma(binomial(n, n\2)); \\ Harry J. Smith, Sep 08 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Sep 11 2001
EXTENSIONS
Offset changed from 0 to 1 by Harry J. Smith, Sep 08 2009
STATUS
approved