n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 62 |
4 | 370 |
5 | 2102 |
6 | 11530 |
7 | 61742 |
8 | 325090 |
9 | 1690982 |
10 | 8717050 |
11 | 44633822 |
12 | 227363410 |
13 | 1153594262 |
14 | 5835080170 |
15 | 29443836302 |
16 | 148292923330 |
17 | 745759583942 |
18 | 3745977788890 |
19 | 18798608421182 |
20 | 94267920012850 |
21 | 472439111692022 |
[1,2,10,62,370,2102,11530,61742,325090,1690982, 8717050,44633822,227363410,1153594262,5835080170, 29443836302,148292923330,745759583942, 3745977788890,18798608421182,94267920012850, 472439111692022] |