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a(n) = (A259429(n) + A259429(n+1)) / 2.
6

%I #6 Jun 26 2022 03:24:46

%S 8,27,64,125,216,343,216,27,64,125,216,343,216,27,64,125,216,343,216,

%T 27,64,125,216,343,216,27,64,125,216,343,216,27,64,125,216,343,216,64,

%U 125,216,343,512,343,64,125,216,125,8,27,64,125,216,343,216,8,27

%N a(n) = (A259429(n) + A259429(n+1)) / 2.

%C All terms are cubes by definition of A259260.

%H Reinhard Zumkeller, <a href="/A259603/b259603.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o a259603 n = a259603_list !! (n-1)

%o a259603_list = zipWith ((flip div 2 .) . (+))

%o a259429_list $ tail a259429_list

%Y Cf. A259429, A000578, A086517, A259260, A259602, A259604, A259605.

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Jun 30 2015