OFFSET
1,1
COMMENTS
Numbers which are twice squares, even squares or odd nonsquares.
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
PROG
(Haskell)
a053868 n = a053868_list !! (n-1)
a053868_list = filter (odd . a001065) [1..]
-- Reinhard Zumkeller, Nov 01 2015, Sep 15 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
Henry Bottomley, Mar 29 2000
EXTENSIONS
Improved name from Omar E. Pol, Aug 14 2009
STATUS
approved