n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 37 |
4 | 199 |
5 | 1069 |
6 | 5743 |
7 | 30853 |
8 | 165751 |
9 | 890461 |
10 | 4783807 |
11 | 25699957 |
12 | 138067399 |
13 | 741736909 |
14 | 3984819343 |
15 | 21407570533 |
16 | 115007491351 |
17 | 617852597821 |
18 | 3319277971807 |
19 | 17832095054677 |
20 | 95799031216999 |
21 | 514659346194349 |
[1,1,7,37,199,1069,5743,30853,165751,890461, 4783807,25699957,138067399,741736909,3984819343, 21407570533,115007491351,617852597821, 3319277971807,17832095054677,95799031216999, 514659346194349] |