n | a(n) |
---|---|
1 | 0 |
2 | 4 |
3 | 13 |
4 | 66 |
5 | 158 |
6 | 934 |
7 | 2446 |
8 | 14567 |
9 | 39972 |
10 | 240130 |
11 | 673665 |
12 | 4073862 |
13 | 11545686 |
14 | 70212506 |
15 | 200446066 |
16 | 1224207384 |
17 | 3512430906 |
18 | 21526789216 |
19 | 62001340484 |
20 | 381049009426 |
21 | 1100824791540 |
22 | 6780941436208 |
23 | 19637801359798 |
24 | 121196222602133 |
[0,4,13,66,158,934,2446,14567,39972,240130,673665, 4073862,11545686,70212506,200446066,1224207384, 3512430906,21526789216,62001340484,381049009426, 1100824791540,6780941436208,19637801359798, 121196222602133] |