n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 11 |
5 | 45 |
6 | 196 |
7 | 894 |
8 | 4215 |
9 | 20377 |
10 | 100463 |
11 | 503191 |
12 | 2553291 |
13 | 13097469 |
14 | 67808104 |
15 | 353851124 |
16 | 1859313324 |
17 | 9828998946 |
18 | 52237988523 |
19 | 278952216129 |
20 | 1495976545546 |
21 | 8053571710250 |
22 | 43507491045810 |
23 | 235784617161780 |
[0,1,1,3,11,45,196,894,4215,20377,100463,503191, 2553291,13097469,67808104,353851124,1859313324, 9828998946,52237988523,278952216129,1495976545546, 8053571710250,43507491045810,235784617161780] |