OFFSET
1,1
COMMENTS
All terms are triangular numbers by definition of A259542.
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
PROG
(Haskell)
a259604 n = a259604_list !! (n-1)
a259604_list = zipWith ((flip div 2 .) . (+))
a259542_list $ tail a259542_list
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jun 30 2015
STATUS
approved