OFFSET
0,3
COMMENTS
Sum of all the parts in the partitions of n into two parts such that the smaller part divides the larger. - Wesley Ivan Hurt, Dec 22 2017
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..1000
FORMULA
a(n) = n * A032741(n).
MAPLE
MATHEMATICA
Table[n*(DivisorSigma[0, n] - 1), {n, 0, 100}] (* Wesley Ivan Hurt, Oct 11 2013 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Nov 20 2009
EXTENSIONS
a(14)-a(55) from Vincenzo Librandi, May 25 2010
New name from Omar E. Pol, Jan 18 2013
STATUS
approved