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a(n) = A005927(n)/2.
0

%I #7 Mar 08 2020 04:49:52

%S 0,0,0,2,3,0,0,0,0,0,0,6,4,0,0,0,0,0,0,6,12,0,0,0,0,0,0,8,0,0,0,0,0,0,

%T 0,12,15,0,0,0,0,0,0,6,12,0,0,0,0,0,0,12,12,0,0,0,0,0,0,18,0,0,0,0,0,

%U 0,0,6,24

%N a(n) = A005927(n)/2.

%K nonn

%O 0,4

%A _N. J. A. Sloane_