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%I #7 Aug 18 2015 00:09:45
%S 1,2,4,3,0,9,4,8,0,16,5,0,0,0,25,6,12,18,0,0,36,7,0,0,0,0,0,49,8,16,0,
%T 32,0,0,0,64,9,0,27,0,0,0,0,0,81,10,20,0,0,50,0,0,0,0,100,11,0,0,0,0,
%U 0,0,0,0,0,121,12,24,36,48,0,72,0,0,0,0,0,144
%N Triangle T(n,k) = n*k if k|n, 0 otherwise; 1<=k<=n.
%C Equals the matrix product A127648 * A127093 as infinite lower triangular matrices.
%F T(n,k) = n*A127093(n,k). - _R. J. Mathar_, Oct 01 2011
%e First few rows of the triangle are:
%e 1;
%e 2, 4;
%e 3, 0, 9;
%e 4, 8, 0, 16;
%e 5, 0, 0, 0, 25;
%e 6, 12, 18, 0, 0, 36;
%e 7, 0, 0, 0, 0, 0, 49;
%e 8, 16, 0, 32, 0, 0, 0, 64;
%e ...
%p A127651 := proc(n,k)
%p if n mod k =0 then
%p n*k;
%p else
%p 0 ;
%p end if;
%p end proc: # _R. J. Mathar_, Oct 01 2011
%Y Cf. A127648, A127093, A064987 (row sums).
%K nonn,tabl,easy
%O 1,2
%A _Gary W. Adamson_, Jan 22 2007
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