n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 18 |
4 | 65 |
5 | 234 |
6 | 859 |
7 | 3198 |
8 | 12011 |
9 | 45422 |
10 | 172745 |
11 | 660010 |
12 | 2531411 |
13 | 9740590 |
14 | 37585189 |
15 | 145376930 |
16 | 563495201 |
17 | 2188229290 |
18 | 8511640099 |
19 | 33157034510 |
20 | 129334888721 |
21 | 505100839930 |
22 | 1974764074999 |
23 | 7728329887670 |
24 | 30272839608101 |
25 | 118682276550082 |
26 | 465645693340003 |
[1,2,5,18,65,234,859,3198,12011,45422,172745, 660010,2531411,9740590,37585189,145376930, 563495201,2188229290,8511640099,33157034510, 129334888721,505100839930,1974764074999, 7728329887670,30272839608101,118682276550082, 465645693340003] |