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Triangle read by rows, A000012 * A144328
2

%I #2 Mar 30 2012 17:25:32

%S 1,2,1,3,2,2,4,3,4,3,5,4,6,6,4,6,5,8,9,8,5,7,6,10,12,12,10,6,8,7,12,

%T 15,16,15,12,7,9,8,14,18,20,20,18,14,8,10,9,16,21,24,25,24,21,16,9,11,

%U 10,18,24,28,30,30,28,24,18,10

%N Triangle read by rows, A000012 * A144328

%C Row sums = A004006: (1, 3, 7, 14, 25, 41, 63, 92, 129,...).

%F Triangle read by rows A000012 * A144328.

%F Partial sums of A144328 by columns.

%e First few rows of the triangle =

%e 1;

%e 2, 1;

%e 3, 2, 2;

%e 4, 3, 4, 3;

%e 5, 4, 6, 6, 4;

%e 6, 5, 8, 9, 8, 5;

%e 7, 6, 10, 12 12, 10, 6;

%e 8, 7, 12, 15, 16, 15, 12, 7;

%e ...

%Y A144328, Cf. A004006

%K nonn,tabl

%O 1,2

%A _Gary W. Adamson_, Sep 18 2008