A128544 - OEIS

%I #4 Feb 18 2022 22:21:28

%S 1,2,1,3,4,2,4,9,9,3,5,16,24,17,5,6,25,50,55,33,8,7,36,90,135,123,61,

%T 13,8,49,147,280,343,259,112,21,9,64,224,518,798,812,532,202,34,10,81,

%U 324,882,1638,2100,1848,1062,361,55

%N A007318 * A128540.

%C Row sums = A069403: (1, 3, 9, 25, 67, ...).

%F A007318 * A128540 as infinite lower triangular matrices; (binomial transform of A128540).

%e First few rows of the triangle:

%e   1;

%e   2,  1;

%e   3,  4,  2;

%e   4,  9,  9,   3;

%e   5, 16, 24,  17,   5;

%e   6, 25, 50,  55,  33,  8;

%e   7, 36, 90, 135, 123, 61, 13;

%e   ...

%Y Cf. A007318, A128540, A069403.

%K nonn,tabl

%O 0,2

%A _Gary W. Adamson_, Mar 10 2007