n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 22 |
6 | 92 |
7 | 426 |
8 | 2146 |
9 | 11624 |
10 | 67146 |
11 | 411142 |
12 | 2656052 |
13 | 18035178 |
14 | 128318314 |
15 | 954086192 |
16 | 7396278762 |
17 | 59659032142 |
18 | 499778527628 |
19 | 4341025729290 |
20 | 39035256389026 |
21 | 362878164902216 |
22 | 3482882959111530 |
23 | 34472032118214598 |
[1,1,2,6,22,92,426,2146,11624,67146,411142, 2656052,18035178,128318314,954086192,7396278762, 59659032142,499778527628,4341025729290, 39035256389026,362878164902216,3482882959111530, 34472032118214598] |