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%I #2 Mar 30 2012 17:25:32
%S 1,2,2,3,4,2,4,6,4,2,5,8,6,4,2,6,10,8,6,4,2,7,12,10,8,6,4,2,8,14,12,
%T 10,8,6,4,2,9,16,14,12,10,8,6,4,2,10,18,16,14,12,10,8,6,4,2,11,20,18,
%U 16,14,12,10,8,6,4,2
%N Triangle read by rows, A000012 * (an infinite lower triangular matrix with 1's in the first column and the rest 2's); 1<=k<=n.
%C Row sums = n^2.
%C The linear sequence A056944 is more appropriately a triangle, (reversal of A143595).
%F Triangle read by rows, A000012 * (an infinite lower triangular matrix with 1's in the first column and the rest 2's); i.e. (1; 1,2; 1,2,2;...). A000012 = an infinite lower triangular matrix with all 1's. 1<=k<=n
%e First few rows of the triangle =
%e 1;
%e 2, 2;
%e 3, 4, 2;
%e 4, 6, 4, 2;
%e 5, 8, 6, 4, 2;
%e 6, 10, 8, 6, 4, 2;
%e 7, 12, 10, 8, 6, 4, 2;
%e ...
%Y Cf. A056944.
%K nonn,tabl
%O 1,2
%A _Gary W. Adamson_, Aug 26 2008
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