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%I #3 Mar 03 2013 14:13:44
%S 1,1,2,1,0,3,1,4,0,4,1,0,0,0,5,1,6,9,0,0,6,1,0,0,0,0,0,7,1,8,0,16,0,0,
%T 0,8,1,0,18,0,0,0,0,0,9,1,10,0,0,25,0,0,0,0,10,1,0,0,0,0,0,0,0,0,0,11,
%U 1,12,30,40,0,36,0,0,0,0,0,12
%N Triangle read by rows, A156348 * A127648
%C Row sums = A157020: (1, 3, 4, 9, 6, 22, 8,...)
%F Triangle read by rows, A156348 * A127648. A127648 = an infinite lower triangular matrix with (1, 2, 3,...) as the main diagonal and the rest zeros.
%e First few rows of the triangle =
%e 1;
%e 1, 2;
%e 1, 0, 3;
%e 1, 4, 0, 4;
%e 1, 0, 0, 0, 5;
%e 1, 6, 9, 0, 0, 6;
%e 1, 0, 0, 0, 0, 0, 7;
%e 1, 8, 0, 16, 0, 0, 0, 8;
%e 1, 0, 18, 0, 0, 0, 0, 0, 9;
%e 1, 10, 0, 0, 25, 0, 0, 0, 0, 10;
%e 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11;
%e 1, 12, 30, 40, 0, 36, 0, 0, 0, 0, 0, 12;
%e 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13;
%e 1, 14, 0, 0, 0, 0, 49, 0, 0, 0, 0, 0, 0, 14;
%e ...
%e Row 4 = (1, 4, 0, 4) = termwise products of (1, 2, 0, 1) and (1, 2, 3, 4)
%e where (1, 2, 0, 1) = row 4 of triangle A156348.
%Y Cf. A156348, A126648, A156020
%K nonn,tabl
%O 1,3
%A _Gary W. Adamson_ & _Mats Granvik_, Mar 01 2009
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