n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 25 |
6 | 49 |
7 | 88 |
8 | 237 |
9 | 500 |
10 | 1412 |
11 | 3570 |
12 | 12846 |
13 | 36072 |
14 | 126504 |
15 | 493920 |
16 | 2358720 |
17 | 12292224 |
18 | 49984224 |
19 | 171237888 |
20 | 642804078 |
21 | 1980490350 |
22 | 6380883000 |
23 | 27032104440 |
24 | 117961599600 |
25 | 555861355920 |
26 | 2623445776224 |
[1,1,2,4,10,25,49,88,237,500,1412,3570,12846, 36072,126504,493920,2358720,12292224,49984224, 171237888,642804078,1980490350,6380883000, 27032104440,117961599600,555861355920, 2623445776224] |