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Triangle T(n,k) read by rows. T(n,k) = A046644(A126988).
2

%I #2 Mar 30 2012 18:53:10

%S 1,2,1,2,0,1,8,2,0,1,2,0,0,0,1,4,2,2,0,0,1,2,0,0,0,0,0,1,16,8,0,2,0,0,

%T 0,1,8,0,2,0,0,0,0,0,1,4,2,0,0,2,0,0,0,0,1,2,0,0,0,0,0,0,0,0,0,1,16,4,

%U 8,2,0,2,0,0,0,0,0,1,2,0,0,0,0,0,0,0,0,0,0,0,1,4,2,0,0,0,0,2,0,0,0,0,0,0,1

%N Triangle T(n,k) read by rows. T(n,k) = A046644(A126988).

%C Denominator in fraction A181116/A181117.

%e Triangle starts:

%e 1,

%e 2,1,

%e 2,0,1,

%e 8,2,0,1,

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

%e 4,2,2,0,0,1,

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

%e 16,8,0,2,0,0,0,1,

%e 8,0,2,0,0,0,0,0,1,

%e 4,2,0,0,2,0,0,0,0,1,

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

%e 16,4,8,2,0,2,0,0,0,0,0,1,

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

%e 4,2,0,0,0,0,2,0,0,0,0,0,0,1,

%e 4,0,2,0,2,0,0,0,0,0,0,0,0,0,1,

%Y Cf. A181116, A046644, A051731.

%K nonn,tabl

%O 1,2

%A _Mats Granvik_, Oct 04 2010