A134480 - OEIS

%I #8 Mar 26 2022 10:15:12

%S 1,3,2,9,7,4,18,15,11,6,30,26,21,15,8,45,40,34,27,19,10,63,57,50,42,

%T 33,23,12,84,77,69,60,50,39,27,14,108,100,91,81,70,58,45,31,16,135,

%U 126,116,105,93,80,66,51,35,18

%N A134478 * A000012.

%C Row sums = A134481: (1, 5, 20, 50, 100, 175, ...).

%C Left border = A134479.

%F A134478 * A000012 as infinite lower triangular matrices. Triangle read by rows, partial sums of A134478 terms starting from the right.

%e First few rows of the triangle:

%e    1;

%e    3,  2;

%e    9,  7,  4;

%e   18, 15, 11,  6;

%e   30, 26, 21, 15,  8;

%e   45, 40, 34, 27, 19, 10;

%e   63, 57, 50, 42, 33, 23, 12;

%e   ...

%Y Cf. A134478, A134481, A134479.

%K nonn,tabl,more

%O 0,2

%A _Gary W. Adamson_, Oct 27 2007