n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 2 |
4 | 3 |
5 | 7 |
6 | 19 |
7 | 61 |
8 | 232 |
9 | 964 |
10 | 4676 |
11 | 23956 |
12 | 140856 |
13 | 859536 |
14 | 5930352 |
15 | 42030864 |
16 | 332618112 |
17 | 2686346496 |
18 | 23973905664 |
19 | 217390853376 |
20 | 2159277212160 |
21 | 21724454016000 |
22 | 237652175232000 |
23 | 2627342116992000 |
24 | 31383255320064000 |
[1,2,2,3,7,19,61,232,964,4676,23956,140856,859536, 5930352,42030864,332618112,2686346496,23973905664, 217390853376,2159277212160,21724454016000, 237652175232000,2627342116992000, 31383255320064000] |