n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 8 |
5 | 24 |
6 | 72 |
7 | 231 |
8 | 764 |
9 | 2574 |
10 | 8840 |
11 | 30796 |
12 | 108528 |
13 | 386308 |
14 | 1386756 |
15 | 5014575 |
16 | 18249120 |
17 | 66786738 |
18 | 245642760 |
19 | 907513530 |
20 | 3366215688 |
21 | 12531502620 |
22 | 46805032560 |
23 | 175341580596 |
24 | 658674458208 |
25 | 2480584898700 |
26 | 9363748625972 |
[1,1,2,3,8,24,72,231,764,2574,8840,30796,108528, 386308,1386756,5014575,18249120,66786738, 245642760,907513530,3366215688,12531502620, 46805032560,175341580596,658674458208, 2480584898700,9363748625972] |