A117139 - OEIS

%I #3 Mar 30 2012 16:50:24

%S 0,0,1,3,0,2,5,1,6,0,3,7,2,8,1,9,0,4,9,3,10,2,11,1,12,0,5,11,4,12,3,

%T 13,2,14,1,15,0,6,13,5,14,4,15,3,16,2,17,1,18,0

%N Similar to A117137 but begin each row with 0. Equals A117137 - 1.

%K nonn,tabf

%O 0,4

%A _N. J. A. Sloane_, Apr 21 2006