OFFSET
1,1
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
P. Pollack, C. Pomerance, Some problems of Erdős on the sum-of-divisors function, For Richard Guy on his 99th birthday: May his sequence be unbounded, 2015, to appear.
PROG
(Haskell)
import Data.List.Ordered (union)
a263838 n = a263838_list !! (n-1)
a263838_list = union a257719_list a257720_list
-- Reinhard Zumkeller, Oct 31 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 30 2015
STATUS
approved