n | a(n) |
---|---|
1 | 1 |
2 | 19 |
3 | 70 |
4 | 251 |
5 | 1350 |
6 | 3716 |
7 | 20706 |
8 | 63545 |
9 | 255501 |
10 | 992477 |
11 | 3693353 |
12 | 15143098 |
13 | 54682695 |
14 | 222402469 |
15 | 838015799 |
16 | 3238327921 |
17 | 12552211666 |
18 | 47967154876 |
19 | 187109798637 |
20 | 714494895572 |
21 | 2773237529931 |
22 | 10674786749417 |
23 | 41144890359713 |
[1,19,70,251,1350,3716,20706,63545,255501,992477, 3693353,15143098,54682695,222402469,838015799, 3238327921,12552211666,47967154876,187109798637, 714494895572,2773237529931,10674786749417, 41144890359713] |