n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 76 |
7 | 232 |
8 | 764 |
9 | 2620 |
10 | 9496 |
11 | 35695 |
12 | 140140 |
13 | 568360 |
14 | 2389192 |
15 | 10338315 |
16 | 46118592 |
17 | 211120144 |
18 | 992316928 |
19 | 4773362476 |
20 | 23500234512 |
21 | 118125854560 |
22 | 606106812640 |
23 | 3168660576795 |
24 | 16872323635132 |
25 | 91369920670420 |
26 | 503022250919640 |
27 | 2811920834508705 |
[1,1,2,4,10,26,76,232,764,2620,9496,35695,140140, 568360,2389192,10338315,46118592,211120144, 992316928,4773362476,23500234512,118125854560, 606106812640,3168660576795,16872323635132, 91369920670420,503022250919640,2811920834508705] |