n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 10 |
5 | 40 |
6 | 197 |
7 | 980 |
8 | 5142 |
9 | 27632 |
10 | 152191 |
11 | 853564 |
12 | 4863492 |
13 | 28075992 |
14 | 163920550 |
15 | 966421928 |
16 | 5746596806 |
17 | 34428962746 |
18 | 207654949801 |
19 | 1259963104618 |
20 | 7686160299232 |
21 | 47116518171284 |
22 | 290105437233107 |
23 | 1793451033655758 |
[0,1,2,10,40,197,980,5142,27632,152191,853564, 4863492,28075992,163920550,966421928,5746596806, 34428962746,207654949801,1259963104618, 7686160299232,47116518171284,290105437233107, 1793451033655758] |