A124747 - OEIS

%I #2 Mar 30 2012 18:59:18

%S 1,0,1,0,0,1,0,0,1,1,0,0,1,1,1,0,0,2,2,2,1,0,0,3,3,3,2,1,0,0,7,7,7,5,

%T 3,1,0,0,12,12,12,9,6,3,1,0,0,30,30,30,23,16,9,4,1,0,0,55,55,55,43,31,

%U 19,10,4,1

%N Inverse of number triangle A124744.

%C Third column and row sums give A047749.

%e Triangle begins

%e 1,

%e 0, 1,

%e 0, 0, 1,

%e 0, 0, 1, 1,

%e 0, 0, 1, 1, 1,

%e 0, 0, 2, 2, 2, 1,

%e 0, 0, 3, 3, 3, 2, 1,

%e 0, 0, 7, 7, 7, 5, 3, 1,

%e 0, 0, 12, 12, 12, 9, 6, 3, 1

%K nonn,tabl

%O 0,18

%A _Paul Barry_, Nov 06 2006