n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 5 |
4 | 21 |
5 | 86 |
6 | 355 |
7 | 1488 |
8 | 6335 |
9 | 27352 |
10 | 119547 |
11 | 528045 |
12 | 2353791 |
13 | 10575810 |
14 | 47849685 |
15 | 217824285 |
16 | 996999525 |
17 | 4585548680 |
18 | 21182609875 |
19 | 98236853415 |
20 | 457211008415 |
21 | 2134851575050 |
22 | 9997848660345 |
23 | 46949087361550 |
24 | 221022160284101 |
25 | 1042916456739696 |
26 | 4931673470809525 |
27 | 23367060132453323 |
[0,1,5,21,86,355,1488,6335,27352,119547,528045, 2353791,10575810,47849685,217824285,996999525, 4585548680,21182609875,98236853415,457211008415, 2134851575050,9997848660345,46949087361550, 221022160284101,1042916456739696,4931673470809525, 23367060132453323] |