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Arithmetic derivative of quarter squares.
3

%I #10 Mar 18 2014 18:01:26

%S 0,0,0,1,4,5,6,16,32,24,10,31,60,41,14,92,192,156,108,123,140,87,22,

%T 188,384,220,26,131,252,247,240,608,1024,560,34,375,756,417,38,476,

%U 960,704,420,493,572,321,46,1036,2112,1340,500,635,780,1107,1458,1620

%N Arithmetic derivative of quarter squares.

%C a(n) = A003415(A002620(n));

%C a(2*n) = A068720(n), n > 0.

%H Reinhard Zumkeller, <a href="/A235711/b235711.txt">Table of n, a(n) for n = 0..10000</a>

%o (Haskell)

%o a235711 = a003415 . a002620

%Y Cf. A068720.

%K nonn

%O 0,5

%A _Reinhard Zumkeller_, Mar 18 2014