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Triangle read by rows: T(n,k) = if n>=2*k and n<2*k*A014963(k-1) then k else 1 T(n,0)=1.
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%I #4 Jul 03 2016 00:15:23

%S 1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,2,1,1,1,1,1,2,3,1,1,1,1,1,2,3,1,1,

%T 1,1,1,1,1,3,4,1,1,1,1,1,1,1,3,4,1,1,1,1,1,1,1,1,3,4,5,1,1,1,1,1,1,1,

%U 1,3,4,5,1,1,1,1,1,1,1,1,1,3,4,5,1,1,1,1,1,1,1,1,1,1,3,4,5,1,1,1,1,1,1,1,1

%N Triangle read by rows: T(n,k) = if n>=2*k and n<2*k*A014963(k-1) then k else 1 T(n,0)=1.

%C Row products give A139550.

%e Row products of the triangle are:

%e 1 = 1

%e 1*1 = 1

%e 1*1*1 = 1

%e 1*1*1*1 = 1

%e 1*1*2*1*1 = 2

%e 1*1*2*1*1*1 = 2

%e 1*1*2*3*1*1*1 = 6

%e 1*1*2*3*1*1*1*1 = 6

%e 1*1*1*3*4*1*1*1*1 = 12

%o (Excel) =if(and(row()-1>=(column()-1)*2;row()-1 < A014963(k-1)*(column()-1)*2);column()-1;1)

%Y Cf. A139550, A139547, A003418.

%K nonn,tabl

%O 0,13

%A _Mats Granvik_, Apr 27 2008