OFFSET
1,2
COMMENTS
Also positions of 2 in A007538. [Reinhard Zumkeller, Feb 14 2012]
MATHEMATICA
(See A188068.)
PROG
(Haskell)
a188069 n = a188069_list !! (n-1)
a188069_list = filter ((== 2) . a007538) [1..]
-- Reinhard Zumkeller, Feb 14 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Mar 20 2011
STATUS
approved