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(A259565(n) + A259565(n+1)) / 2.
6

%I #4 Jun 30 2015 17:15:15

%S 2,5,6,7,10,13,14,15,19,22,21,22,26,29,30,31,34,37,38,39,42,46,47,46,

%T 51,53,55,58,55,57,62,65,66,67,70,73,74,77,79,78,82,86,85,86,91,94,93,

%U 94,101,102,101,102,105,110,109,110,114,118,119,118,122,127

%N (A259565(n) + A259565(n+1)) / 2.

%C All terms are squarefree by definition of A259565.

%H Reinhard Zumkeller, <a href="/A259605/b259605.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o a259605 n = a259605_list !! (n-1)

%o a259605_list = zipWith ((flip div 2 .) . (+))

%o a259565_list $ tail a259565_list

%Y Cf. A259565, A005117, A086517, A259602, A259603, A259604.

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Jun 30 2015