A129558 - OEIS

%I #4 Feb 18 2022 22:46:41

%S 1,1,1,1,0,1,2,1,0,1,3,0,0,0,1,1,1,1,0,0,1,5,0,0,0,0,0,1,4,2,0,1,0,0,

%T 0,1,4,0,1,0,0,0,0,0,1,3,3,0,0,1,0,0,0,0,1

%N A054523 * A129360.

%C Row sums = A062570, phi(2*n): (1, 2, 2, 4, 4, 4, 6, 8, ...).

%F A054523 * A129360 as infinite lower triangular matrices.

%e First few rows of the triangle:

%e   1;

%e   1, 1;

%e   1, 0, 1;

%e   2, 1, 0, 1;

%e   3, 0, 0, 0, 1;

%e   1, 1, 1, 0, 0, 1;

%e   5, 0, 0, 0, 0, 0, 1;

%e   4, 2, 0, 1, 0, 0, 0, 1;

%e   4, 0, 1, 0, 0, 0, 0, 0, 1;

%e   ...

%Y Cf. A054523, A129360, A062570.

%K nonn,tabl

%O 1,7

%A _Gary W. Adamson_, Apr 20 2007