%I #8 May 28 2021 13:42:30

%S 1,2,4,3,5,8,7,11,6,9,10,13,14,16,19,17,22,20,12,15,18,23,26,28,25,29,

%T 31,32,34,37,24,21,27,30,35,38,41,43,40,44,46,47,49,50,52,33,36,39,42,

%U 48,45,53,56,55,58,59,61,62,64,67,68,71,65,70,73,76,51

%N a(n) = A084937(3n+2)/2.

%H Reinhard Zumkeller, <a href="/A249683/b249683.txt">Table of n, a(n) for n = 0..10000</a>

%o (Haskell)

%o a249683 = flip div 2 . a249681 -- _Reinhard Zumkeller_, Nov 04 2014

%Y Cf. A084937, A249680-A249682.

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Nov 03 2014