n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 7 |
5 | 23 |
6 | 72 |
7 | 238 |
8 | 831 |
9 | 2959 |
10 | 10645 |
11 | 38824 |
12 | 143492 |
13 | 535700 |
14 | 2016020 |
15 | 7641574 |
16 | 29152015 |
17 | 111841263 |
18 | 431209723 |
19 | 1669945778 |
20 | 6493144143 |
21 | 25338440143 |
22 | 99204579648 |
23 | 389570145288 |
24 | 1534026813892 |
25 | 6055885764548 |
26 | 23962654178012 |
27 | 95023123291680 |
[1,1,1,2,7,23,72,238,831,2959,10645,38824,143492, 535700,2016020,7641574,29152015,111841263, 431209723,1669945778,6493144143,25338440143, 99204579648,389570145288,1534026813892, 6055885764548,23962654178012,95023123291680] |