A134560 - OEIS

%I #16 Oct 28 2023 15:28:33

%S 1,1,3,1,0,5,1,3,0,7,1,0,0,0,9,1,3,5,0,0,11,1,0,0,0,0,0,13,1,3,0,7,0,

%T 0,0,15,1,0,5,0,0,0,0,0,17,1,3,0,0,9,0,0,0,0,19,1,0,0,0,0,0,0,0,0,0,

%U 21,1,3,5,7,0,11,0,0,0,0,0,23

%N Triangle A051731 * A127775 (as infinite lower triangular matrices).

%C Obtained also by replacing the 1's in column k of A051731 with (2k-1).

%e First few rows of the triangle:

%e   1;

%e   1,  3;

%e   1,  0,  5;

%e   1,  3,  0,  7;

%e   1,  0,  0,  0,  9;

%e   1,  3,  5,  0,  0, 11;

%e   1,  0,  0,  0,  0,  0, 13;

%e   1,  3,  0,  7,  0,  0,  0, 15;

%e   ...

%Y Cf. A129235 (row sums), A051731, A127775.

%K nonn,tabl

%O 1,3

%A _Gary W. Adamson_, Oct 31 2007