n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 20 |
4 | 86 |
5 | 396 |
6 | 1887 |
7 | 9277 |
8 | 46748 |
9 | 240189 |
10 | 1253474 |
11 | 6625814 |
12 | 35401302 |
13 | 190878795 |
14 | 1037296173 |
15 | 5675580349 |
16 | 31240459117 |
17 | 172871809365 |
18 | 961124621229 |
19 | 5366264076784 |
20 | 30076030970681 |
21 | 169149177823245 |
22 | 954301797559301 |
23 | 5399467787889483 |
24 | 30631118027908197 |
[1,2,5,20,86,396,1887,9277,46748,240189,1253474, 6625814,35401302,190878795,1037296173,5675580349, 31240459117,172871809365,961124621229, 5366264076784,30076030970681,169149177823245, 954301797559301,5399467787889483, 30631118027908197] |