|
%I #7 Mar 23 2022 07:39:36
%S 1,1,1,2,0,2,1,1,0,1,2,0,0,0,2,2,2,2,0,0,2,2,0,0,0,0,0,2,1,1,0,1,0,0,
%T 0,1,3,0,3,0,0,0,0,0,3,2,2,0,0,2,0,0,0,0,2
%N A133698 * A051731.
%C Left and right borders = A001227: (1, 1, 2, 1, 2, 2, 2, ...), the number of odd divisors of n.
%C Row sums = A133702, the inverse Mobius transform of A023136.
%F A133698 * A051731 as infinite lower triangular matrices.
%e First few rows of the triangle:
%e 1;
%e 1, 1;
%e 2, 0, 2;
%e 1, 1, 0, 1;
%e 2, 0, 0, 0, 2;
%e 2, 2, 2, 0, 0, 2;
%e 2, 0, 0, 0, 0, 0, 2;
%e 1, 1, 0, 1, 0, 0, 0, 1;
%e ...
%Y Cf. A051731, A133698, A001227, A133702, A023136.
%K nonn,tabl,more
%O 1,4
%A _Gary W. Adamson_, Sep 21 2007
|
