OFFSET
0,3
LINKS
Amiram Eldar, Table of n, a(n) for n = 0..1667
FORMULA
MAPLE
with(numtheory): seq(sigma(binomial(2*n, n)/(n+1)), n = 0 .. 25); # Emeric Deutsch, Jan 10 2009
MATHEMATICA
DivisorSigma[1, CatalanNumber[Range[0, 30]]] (* Harvey P. Dale, Apr 17 2015 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Dec 14 2008
EXTENSIONS
Extended by R. J. Mathar and Emeric Deutsch, Jan 08 2009
STATUS
approved