%I #2 Mar 30 2012 18:51:04
%S 1,3,4,8,10,16,21,26,34,39,48,50,60,60,65,65,65,62,56,52,40,32,18,8,
%T -8,-18,-32,-40,-52,-56,-62,-65,-65,-65,-60,-60,-50,-48,-39,-34,-26,
%U -21,-16,-10,-8,-4,-3,-1,-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N First differences of A165271.
%C a(n) = A165271(n+1) - A165271(n);
%C a(n) > 0 for n < 24;
%C a(n) < 0 for 24 <= n <= 48;
%C a(n) = 0 for n > 48.
%Y Cf. A165273.
%K sign
%O 0,2
%A _Reinhard Zumkeller_, Sep 13 2009