cp's OEIS Frontend

A107249 A number triangle with repeated columns of binomial coefficients.

%I A107249 #3 Mar 30 2012 18:59:07
%S A107249 1,1,1,1,1,1,2,1,1,1,3,2,2,1,1,6,3,3,2,1,1,10,6,6,3,3,1,1,20,10,10,6,
%T A107249 4,3,1,1,35,20,20,10,10,4,4,1,1,70,35,35,20,15,10,5,4,1,1,126,70,70,
%U A107249 35,35,15,15,5,5,1,1,252,126,126,70,56,35,21,15,6,5,1,1,462,252,252,126,126
%N A107249 A number triangle with repeated columns of binomial coefficients.
%C A107249 Reversal of A096921. Row sums are A026010. Diagonal sums are 107250.
%F A107249 Number triangle T(n, k)=C(floor((2n-k-2)/2), floor((n-k)/2))
%e A107249 Triangle begins
%e A107249 1;
%e A107249 1,1;
%e A107249 1,1,1;
%e A107249 2,1,1,1;
%e A107249 3,2,2,1,1;
%e A107249 6,3,3,2,1,1;
%e A107249 10,6,6,3,3,1,1;
%K A107249 easy,nonn,tabl
%O A107249 0,7
%A A107249 _Paul Barry_, May 14 2005