n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 11 |
4 | 37 |
5 | 134 |
6 | 505 |
7 | 1964 |
8 | 7834 |
9 | 31880 |
10 | 131833 |
11 | 552392 |
12 | 2340181 |
13 | 10007048 |
14 | 43136554 |
15 | 187244489 |
16 | 817754563 |
17 | 3590696546 |
18 | 15842313289 |
19 | 70198094315 |
20 | 312258202582 |
21 | 1393879987262 |
22 | 6241982874715 |
23 | 28034051706962 |
[1,2,4,11,37,134,505,1964,7834,31880,131833, 552392,2340181,10007048,43136554,187244489, 817754563,3590696546,15842313289,70198094315, 312258202582,1393879987262,6241982874715, 28034051706962] |