A113998 - OEIS

%I #5 Sep 08 2013 13:30:50

%S 1,1,1,1,0,1,1,0,1,1,1,0,0,0,1,1,0,0,1,1,1,1,0,0,0,0,0,1,1,0,0,0,1,0,

%T 1,1,1,0,0,0,0,0,1,0,1,1,0,0,0,0,1,0,0,1,1,1,0,0,0,0,0,0,0,0,0,1,1,0,

%U 0,0,0,0,1,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,0,0,0,0,1,1

%N Reverse of triangle A051731.

%C Row sums are A000005. Diagonal sums are A001227 (?). Row k corresponds to A113999(k).

%F Sum_{k, 1<=k<=n} k*T(n,k)=A081307(n) - _Philippe Deléham_, Feb 03 2007

%e Triangle begins

%e 1;

%e 1,1;

%e 1,0,1;

%e 1,0,1,1;

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

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

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

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

%K nonn,tabl

%O 1,1

%A _Paul Barry_, Nov 12 2005