OFFSET
1,1
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..250
PROG
(Haskell)
a252939 n = a252939_list !! (n-1)
a252939_list = zipWith (-) (tail a252912_list) a252912_list
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Dec 25 2014
STATUS
approved