A129236 - OEIS

%I #4 Feb 18 2022 22:29:56

%S 1,1,2,2,0,3,2,1,0,4,4,0,0,0,5,2,2,1,0,0,6,6,0,0,0,0,0,7,4,2,0,1,0,0,

%T 0,8,6,0,2,0,0,0,0,0,9,4,4,0,0,1,0,0,0,0,10

%N A054525 * A129234.

%C Left border = phi(n), A000010: (1, 1, 2, 2, 4, 2, 6, ...). A129237 = inverse Moebius transform of A129234.

%F A054525 * A129234 as infinite lower triangular matrices.

%e First few rows of the triangle:

%e   1;

%e   1, 2;

%e   2, 0, 3;

%e   2, 1, 0, 4;

%e   4, 0, 0, 0, 5;

%e   2, 2, 1, 0, 0, 6;

%e   6, 0, 0, 0, 0, 0, 7;

%e   4, 2, 0, 1, 0, 0, 0, 8;

%e   ...

%Y Cf. A129234, A129235, A129237.

%K nonn,tabl

%O 1,3

%A _Gary W. Adamson_, Apr 05 2007