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%I #3 Mar 03 2013 14:17:02
%S 1,2,1,3,0,1,4,2,0,1,4,0,1,0,1,7,2,1,1,0,1,5,0,1,0,1,0,1,8,3,0,2,0,1,
%T 0,18,0,2,0,1,0,1,0,1,10,2,1,1,1,1,0,1,0,1
%N Triangle read by rows, A051731 * A158948
%C Row sums = sigma(n), A000203. Left column = A079247
%F Triangle read by rows, A051731 * A158948
%e First few rows of the triangle =
%e 1;
%e 2, 1;
%e 3, 0, 1;
%e 4, 2, 0, 1;
%e 4, 0, 1, 0, 1;
%e 7, 2, 1, 1, 0, 1;
%e 5, 0, 1, 0, 1, 0, 1;
%e 8, 3, 0, 2, 0, 1, 0, 1;
%e 8, 0, 2, 0, 1, 0, 1, 0, 1;
%e 10, 2, 1, 1, 1, 1, 0, 1, 0, 1;
%e 7, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1;
%e 15, 4, 1, 3, 0, 2, 0, 10, 1, 0, 1;
%e 8, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1;
%e 13, 2, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1;
%e ...
%Y Cf. A158948, A000203, A051731
%K nonn,tabl
%O 1,2
%A _Gary W. Adamson_ & _Mats Granvik_, Mar 31 2009