A104989 - cp's OEIS frontend

A104989 Row sums of triangle A104988, which equals the matrix square of triangle A104980.

n	a(n)
0	1
1	3
2	13
3	69
4	433
5	3133
6	25657
7	234537
8	2367825
9	26176981
10	314670353
11	4088360569
12	57112939433
13	853922061413
14	13609089281849
15	230346936181465
16	4127180489763649
17	78046835384582069
18	1553536327234953153

[1, 3, 13, 69, 433, 3133, 25657, 234537, 2367825, 26176981, 314670353, 4088360569, 57112939433, 853922061413, 13609089281849, 230346936181465, 4127180489763649, 78046835384582069, 1553536327234953153]

cp's OEIS Frontend

A104989 Row sums of triangle A104988, which equals the matrix square of triangle A104980.

Table of values

List of values