n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 23 |
5 | 103 |
6 | 513 |
7 | 2761 |
8 | 15767 |
9 | 94359 |
10 | 586590 |
11 | 3763290 |
12 | 24792705 |
13 | 167078577 |
14 | 1148208090 |
15 | 8026793118 |
16 | 56963722223 |
17 | 409687815151 |
18 | 2981863943718 |
19 | 21937062144834 |
20 | 162958355218089 |
21 | 1221225517285209 |
22 | 9225729232653663 |
23 | 70209849031116183 |
24 | 537935616492552297 |
[1,1,2,6,23,103,513,2761,15767,94359,586590, 3763290,24792705,167078577,1148208090,8026793118, 56963722223,409687815151,2981863943718, 21937062144834,162958355218089,1221225517285209, 9225729232653663,70209849031116183, 537935616492552297] |