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Triangle read by rows, square of A054521, 1<=k<=n.
2

%I #5 Apr 10 2013 15:28:24

%S 1,1,0,2,0,0,2,1,0,0,4,1,1,0,0,2,1,1,1,0,0,6,2,2,1,1,0,0,4,3,2,2,1,1,

%T 0,0,6,2,4,2,2,1,1,0,0,4,3,1,2,2,1,1,1,0,0,10,4,5,3,4,1,3,1,1,0,0,4,3,

%U 3,3,2,2,1,1,1,1,0,0

%N Triangle read by rows, square of A054521, 1<=k<=n.

%C Left border = phi(n), A000010.

%C Row sums = A053570: (1, 1, 2, 3, 6, 5, 12, 13,...).

%F Triangle read by rows, square of A054521, 1<=k<=n

%e First few rows of the triangle =

%e 1;

%e 1, 0;

%e 2, 0, 0;

%e 2, 1, 0, 0;

%e 4, 1, 1, 0, 0;

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

%e 6, 2, 2, 1, 1, 0, 0;

%e 4, 3, 2, 2, 1, 1, 0, 0;

%e 6, 2, 4, 2, 2, 1, 1, 0, 0;

%e ...

%Y Cf. A054521, A000010, A053570.

%K nonn,tabl

%O 1,4

%A _Gary W. Adamson_, Aug 27 2008