%I A127481
%S A127481 1,3,2,4,0,6,7,6,0,8,6,0,0,0,20,12,8,18,0,0,12,8,0,0,0,0,0,42,15,14,0,
%T A127481 24,0,0,0,32,13,0,24,0,0,0,0,0,54,18,12,0,0,60,0,0,0,0,40
%N A127481 Triangle, left column = sigma(n), row sums = sigma_2(n).
%C A127481 Left column = sigma(n); row sums = sigma_2(n), A001157: (1, 5, 10, 21, 
               26, 50,...). Right border = n*phi(n), A002618.
%F A127481 A127093 * A054522 as infinite lower triangular matrices.
%e A127481 First few rows of the triangle are:
%e A127481 1;
%e A127481 3, 2;
%e A127481 4, 0, 6;
%e A127481 7, 6, 0, 8;
%e A127481 6, 0, 0, 0, 20,
%e A127481 12, 8, 18, 0, 0, 12;
%e A127481 8, 0, 0, 0, 0, 0, 42;
%e A127481 15, 14, 0, 24, 0, 0, 0, 32;
%e A127481 ...
%Y A127481 Cf. A054522, A127093, A001157, A002618, A000203, A127466.
%Y A127481 Sequence in context: A129237 A127099 A004545 this_sequence A154879 A097673 
               A140430
%Y A127481 Adjacent sequences: A127478 A127479 A127480 this_sequence A127482 A127483 
               A127484
%K A127481 nonn,tabl,uned
%O A127481 1,2
%A A127481 Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 15 2007